Unify naming of LangOptions variable/get function across the Clang stack (Lex to AST).

The member variable is always "LangOpts" and the member function is always "getLangOpts".

Reviewed by Chris Lattner

llvm-svn: 152536
diff --git a/clang/lib/Rewrite/RewriteTest.cpp b/clang/lib/Rewrite/RewriteTest.cpp
index c446324..019e5e7 100644
--- a/clang/lib/Rewrite/RewriteTest.cpp
+++ b/clang/lib/Rewrite/RewriteTest.cpp
@@ -18,7 +18,7 @@
 
 void clang::DoRewriteTest(Preprocessor &PP, raw_ostream* OS) {
   SourceManager &SM = PP.getSourceManager();
-  const LangOptions &LangOpts = PP.getLangOptions();
+  const LangOptions &LangOpts = PP.getLangOpts();
 
   TokenRewriter Rewriter(SM.getMainFileID(), SM, LangOpts);