clang/test/CodeGenOpenCL/opencl_types.cl: Tweak expressions according to r237548.

With MS mangler, the signature is:

  x86: define void @"\01?bad1@@$$J0YAXPAPAUocl_image1d@@PAPAUocl_image2d@@1@Z"  (%opencl.image1d_t** %b, %opencl.image2d_t** %c, %opencl.image2d_t** %d) nounwind
  x64: define void @"\01?bad1@@$$J0YAXPEAPAUocl_image1d@@PEAPAUocl_image2d@@1@Z"(%opencl.image1d_t** %b, %opencl.image2d_t** %c, %opencl.image2d_t** %d) nounwind

llvm-svn: 237551