Make helpers static. Add missing include so LLVMInitializeObjCARCOpts gets C linkage.

llvm-svn: 175264
diff --git a/llvm/lib/Transforms/ObjCARC/ObjCARC.cpp b/llvm/lib/Transforms/ObjCARC/ObjCARC.cpp
index f798063..53a31b0 100644
--- a/llvm/lib/Transforms/ObjCARC/ObjCARC.cpp
+++ b/llvm/lib/Transforms/ObjCARC/ObjCARC.cpp
@@ -15,6 +15,7 @@
 
 #include "ObjCARC.h"
 #include "llvm-c/Core.h"
+#include "llvm-c/Initialization.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Support/CommandLine.h"