Revert r271136 [OpenCL] Add the default header file opencl-c.h for OpenCL C...

Revert r271136 [OpenCL] Add the default header file opencl-c.h for OpenCL C language due to build failure on ppc64/hexagon/systemz.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@271144 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Headers/CMakeLists.txt

@@ -48,7 +48,6 @@ set(files
   module.modulemap
   mwaitxintrin.h
   nmmintrin.h
-  opencl-c.h
   pkuintrin.h
   pmmintrin.h
   popcntintrin.h

test/Headers/opencl-c-header.cl

-// RUN: %clang_cc1 -internal-isystem ../../lib/Headers -include opencl-c.h -emit-llvm -o - %s | FileCheck %s
-// RUN: %clang_cc1 -internal-isystem ../../lib/Headers -include opencl-c.h -emit-llvm -o - %s -cl-std=CL1.1| FileCheck %s
-// RUN: %clang_cc1 -internal-isystem ../../lib/Headers -include opencl-c.h -emit-llvm -o - %s -cl-std=CL1.2| FileCheck %s
-// RUN: %clang_cc1 -internal-isystem ../../lib/Headers -include opencl-c.h -fblocks -emit-llvm -o - %s -cl-std=CL2.0| FileCheck %s
-
-// CHECK: _Z16convert_char_rtec
-char f(char x) {
-  return convert_char_rte(x);
-}