Sort all of Clang's files under 'lib', and fix up the broken headers
uncovered.

This required manually correcting all of the incorrect main-module
headers I could find, and running the new llvm/utils/sort_includes.py
script over the files.

I also manually added quite a few missing headers that were uncovered by
shuffling the order or moving headers up to be main-module-headers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169237 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index e174975..0d886e2 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -9,17 +9,17 @@
 
 #include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Basic/Diagnostic.h"
-#include "clang/Basic/Version.h"
 #include "clang/Basic/FileManager.h"
-#include "clang/Lex/HeaderSearchOptions.h"
+#include "clang/Basic/Version.h"
 #include "clang/Driver/Arg.h"
 #include "clang/Driver/ArgList.h"
-#include "clang/Driver/Options.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/OptTable.h"
 #include "clang/Driver/Option.h"
+#include "clang/Driver/Options.h"
 #include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Frontend/LangStandard.h"
+#include "clang/Lex/HeaderSearchOptions.h"
 #include "clang/Serialization/ASTReader.h"
 #include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/OwningPtr.h"