[OpenCL] Add supported OpenCL extensions to target info.
Add supported OpenCL extensions to target info. It serves as default values to save the users of the burden setting each supported extensions and optional core features in command line.
Re-commit after fixing build error due to missing override attribute.
Differential Revision: http://reviews.llvm.org/D19484
llvm-svn: 269670
diff --git a/clang/test/Parser/opencl-pragma.cl b/clang/test/Parser/opencl-pragma.cl
index 4c48b2a..b002b08 100644
--- a/clang/test/Parser/opencl-pragma.cl
+++ b/clang/test/Parser/opencl-pragma.cl
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -verify -pedantic -Wno-empty-translation-unit -fsyntax-only
+// RUN: %clang_cc1 %s -verify -pedantic -Wno-empty-translation-unit -fsyntax-only -triple spir-unknown-unknown
#pragma OPENCL EXTENSION cl_khr_fp16 : enable