Fixing the build break introduced by the change in LangStandard in clang

[xiaobai]

Summary

LangStandards.def was changed in commit 59456511f4bab95ccd3c918dae256f5ec0f8fb39 in clang.
Specifically, LangStandard::lang_opencl became LangStandard::lang_opencl10.
This caused ClangASTContext.cpp to fail to compile.

[labath]

I already submitted a fix of my own before seeing this. Thanks for the patch though. :)

[clayborg]

looks fine

source/Symbol/ClangASTContext.cpp

static void ParseLangArgs(LangOptions &Opts, InputKind IK, const char *triple) {
   if (LangStd == LangStandard::lang_unspecified) {
     // Based on the base language, pick one.
     switch (IK.getLanguage()) {
     case InputKind::Unknown:
     case InputKind::LLVM_IR:
     case InputKind::RenderScript:
       llvm_unreachable("Invalid input kind!");
     case InputKind::OpenCL:
-      LangStd = LangStandard::lang_opencl;
+      LangStd = LangStandard::lang_opencl10;
       break;
     case InputKind::CUDA:
       LangStd = LangStandard::lang_cuda;
       break;
     case InputKind::Asm:
     case InputKind::C:
     case InputKind::ObjC:
       LangStd = LangStandard::lang_gnu99;
static void ParseLangArgs(LangOptions &Opts, InputKind IK, const char *triple) {
   Opts.GNUMode = Std.isGNUMode();
   Opts.GNUInline = !Std.isC99();
   Opts.HexFloats = Std.hasHexFloats();
   Opts.ImplicitInt = Std.hasImplicitInt();
 
   Opts.WChar = true;
 
   // OpenCL has some additional defaults.
-  if (LangStd == LangStandard::lang_opencl) {
+  if (LangStd == LangStandard::lang_opencl10) {
     Opts.OpenCL = 1;
     Opts.AltiVec = 1;
     Opts.CXXOperatorNames = 1;
     Opts.LaxVectorConversions = 1;
   }
 
   // OpenCL and C++ both have bool, true, false keywords.
   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;