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.

llvm-svn: 169237

clang/lib/Basic/SourceManager.cpp

@@ -12,20 +12,20 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Basic/SourceManager.h"
-#include "clang/Basic/SourceManagerInternals.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/FileManager.h"
-#include "llvm/ADT/StringSwitch.h"
+#include "clang/Basic/SourceManagerInternals.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/Capacity.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Path.h"
-#include "llvm/Support/Capacity.h"
+#include "llvm/Support/raw_ostream.h"
 #include <algorithm>
-#include <string>
 #include <cstring>
+#include <string>
 #include <sys/stat.h>
 
 using namespace clang;