[OpenCL] Add support of cl_intel_device_side_avc_motion_estimation extension

Summary:
Documentation can be found at https://www.khronos.org/registry/OpenCL/extensions/intel/cl_intel_device_side_avc_motion_estimation.txt

Patch by Kristina Bessonova


Reviewers: Anastasia, yaxunl, shafik

Reviewed By: Anastasia

Subscribers: arphaman, sidorovd, AlexeySotkin, krisb, bader, asavonic, cfe-commits

Differential Revision: https://reviews.llvm.org/D51484

llvm-svn: 346392
diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
index 0b1bef1..53568f1 100644
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -988,6 +988,10 @@
   case BuiltinType::Id: \
     return Importer.getToContext().SingletonId;
 #include "clang/Basic/OpenCLImageTypes.def"
+#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
+  case BuiltinType::Id: \
+    return Importer.getToContext().Id##Ty;
+#include "clang/Basic/OpenCLExtensionTypes.def"
 #define SHARED_SINGLETON_TYPE(Expansion)
 #define BUILTIN_TYPE(Id, SingletonId) \
   case BuiltinType::Id: return Importer.getToContext().SingletonId;