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/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index 4fddd11..444d9f3 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -14,19 +14,18 @@
 #include "clang/Frontend/Utils.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/LangOptions.h"
-#include "clang/Lex/HeaderSearchOptions.h"
+#include "clang/Config/config.h" // C_INCLUDE_DIRS
 #include "clang/Lex/HeaderSearch.h"
-#include "llvm/ADT/SmallString.h"
+#include "clang/Lex/HeaderSearchOptions.h"
 #include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/ADT/Twine.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Path.h"
-
-#include "clang/Config/config.h" // C_INCLUDE_DIRS
+#include "llvm/Support/raw_ostream.h"
 
 using namespace clang;
 using namespace clang::frontend;