[OpenCL] Move OpenCLImageTypes.def from clangAST to clangBasic library.

Putting OpenCLImageTypes.def to clangAST library violates layering requirement: "It's not OK for a Basic/ header to include an AST/ header".
This fixes the modules build.

Differential revision: http://reviews.llvm.org/D18954
Reviewers: Richard Smith, Vassil Vassilev.

llvm-svn: 266180
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index a521fbf..747d0a9 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -988,7 +988,7 @@
   case tok::kw___bool:
   case tok::kw__Atomic:
 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
-#include "clang/AST/OpenCLImageTypes.def"
+#include "clang/Basic/OpenCLImageTypes.def"
   case tok::kw___unknown_anytype:
     return TPResult::False;