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/RewriteModernObjC.cpp b/clang/lib/Rewrite/RewriteModernObjC.cpp
index 269249d..5aea701 100644
--- a/clang/lib/Rewrite/RewriteModernObjC.cpp
+++ b/clang/lib/Rewrite/RewriteModernObjC.cpp
@@ -613,7 +613,7 @@
   MainFileStart = MainBuf->getBufferStart();
   MainFileEnd = MainBuf->getBufferEnd();
 
-  Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOptions());
+  Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
 }
 
 //===----------------------------------------------------------------------===//