Sort the includes according to the coding standard.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170905 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Frontend/CompilerInvocation.cpp

@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/Version.h"
@@ -16,7 +17,6 @@
 #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"