clang/Modules: Move Serialization/Module.{h,cpp} to ModuleFile, NFC

Remove some cognitive load by renaming clang/Serialization/Module.h to
clang/Serialization/ModuleFile.h, since it declares the ModuleFile
class.  This also makes editing a bit easier, since the basename of the
file no long conflicts with clang/Basic/Module.h, which declares the
Module class.  Also move lib/Serialization/Module.cpp to
lib/Serialization/ModuleFile.cpp.
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 36c2952..0e5a387 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -76,7 +76,7 @@
 #include "clang/Serialization/ContinuousRangeMap.h"
 #include "clang/Serialization/GlobalModuleIndex.h"
 #include "clang/Serialization/InMemoryModuleCache.h"
-#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleFile.h"
 #include "clang/Serialization/ModuleFileExtension.h"
 #include "clang/Serialization/ModuleManager.h"
 #include "clang/Serialization/PCHContainerOperations.h"
diff --git a/clang/lib/Serialization/ASTReaderDecl.cpp b/clang/lib/Serialization/ASTReaderDecl.cpp
index 9f799e3..8991a39 100644
--- a/clang/lib/Serialization/ASTReaderDecl.cpp
+++ b/clang/lib/Serialization/ASTReaderDecl.cpp
@@ -50,7 +50,7 @@
 #include "clang/Serialization/ASTBitCodes.h"
 #include "clang/Serialization/ASTReader.h"
 #include "clang/Serialization/ContinuousRangeMap.h"
-#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleFile.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/STLExtras.h"
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 28affed..4c18662 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -65,7 +65,7 @@
 #include "clang/Sema/Weak.h"
 #include "clang/Serialization/ASTReader.h"
 #include "clang/Serialization/InMemoryModuleCache.h"
-#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleFile.h"
 #include "clang/Serialization/ModuleFileExtension.h"
 #include "clang/Serialization/SerializationDiagnostic.h"
 #include "llvm/ADT/APFloat.h"
diff --git a/clang/lib/Serialization/CMakeLists.txt b/clang/lib/Serialization/CMakeLists.txt
index ab90635..1f05117 100644
--- a/clang/lib/Serialization/CMakeLists.txt
+++ b/clang/lib/Serialization/CMakeLists.txt
@@ -16,7 +16,7 @@
   GeneratePCH.cpp
   GlobalModuleIndex.cpp
   InMemoryModuleCache.cpp
-  Module.cpp
+  ModuleFile.cpp
   ModuleFileExtension.cpp
   ModuleManager.cpp
   PCHContainerOperations.cpp
diff --git a/clang/lib/Serialization/GlobalModuleIndex.cpp b/clang/lib/Serialization/GlobalModuleIndex.cpp
index 54ab176..dddee77 100644
--- a/clang/lib/Serialization/GlobalModuleIndex.cpp
+++ b/clang/lib/Serialization/GlobalModuleIndex.cpp
@@ -10,12 +10,12 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "clang/Serialization/GlobalModuleIndex.h"
 #include "ASTReaderInternals.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Serialization/ASTBitCodes.h"
-#include "clang/Serialization/GlobalModuleIndex.h"
-#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleFile.h"
 #include "clang/Serialization/PCHContainerOperations.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/MapVector.h"
diff --git a/clang/lib/Serialization/Module.cpp b/clang/lib/Serialization/ModuleFile.cpp
similarity index 93%
rename from clang/lib/Serialization/Module.cpp
rename to clang/lib/Serialization/ModuleFile.cpp
index 2b6c921..db896fd 100644
--- a/clang/lib/Serialization/Module.cpp
+++ b/clang/lib/Serialization/ModuleFile.cpp
@@ -1,4 +1,4 @@
-//===- Module.cpp - Module description ------------------------------------===//
+//===- ModuleFile.cpp - Module description --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -6,12 +6,12 @@
 //
 //===----------------------------------------------------------------------===//
 //
-//  This file implements the Module class, which describes a module that has
-//  been loaded from an AST file.
+//  This file implements the ModuleFile class, which describes a module that
+//  has been loaded from an AST file.
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleFile.h"
 #include "ASTReaderInternals.h"
 #include "clang/Serialization/ContinuousRangeMap.h"
 #include "llvm/ADT/StringRef.h"
diff --git a/clang/lib/Serialization/ModuleManager.cpp b/clang/lib/Serialization/ModuleManager.cpp
index 669ab90..daef502 100644
--- a/clang/lib/Serialization/ModuleManager.cpp
+++ b/clang/lib/Serialization/ModuleManager.cpp
@@ -18,7 +18,7 @@
 #include "clang/Lex/ModuleMap.h"
 #include "clang/Serialization/GlobalModuleIndex.h"
 #include "clang/Serialization/InMemoryModuleCache.h"
-#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleFile.h"
 #include "clang/Serialization/PCHContainerOperations.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SetVector.h"