[OpenCL] Actually activate Frontend/opencl.cl test and fix test bugs

[mboehme]

Summary

rL275318 added the test Frontend/opencl.cl test, but that test was never actually run because Frontend/lit.local.cfg doesn't contain the '.cl' file suffix.

Once the test is activated, it fails with (unintended) compile errors in the newly added CHECK_INVALID_OPENCL_VERSION checks.

This patch adds the '.cl' file suffix to Frontend/lit.local.cfg to activate the test and fixes the test bug by adding '-fblocks' to the relevant command lines.

cfe/trunk/test/Frontend/lit.local.cfg

-config.suffixes = ['.c', '.cpp', '.m', '.mm', '.ll']
+config.suffixes = ['.c', '.cpp', '.m', '.mm', '.ll', '.cl']

cfe/trunk/test/Frontend/opencl.cl

 // RUN: %clang_cc1 %s -verify -fsyntax-only
 // RUN: %clang_cc1 %s -verify -fsyntax-only -cl-std=CL1.1
 // RUN: %clang_cc1 %s -verify -fsyntax-only -cl-std=CL1.2
 // RUN: %clang_cc1 %s -verify -fsyntax-only -cl-std=CL2.0
 // RUN: %clang_cc1 %s -verify -fsyntax-only -fblocks -DBLOCKS
 // RUN: %clang_cc1 %s -verify -fsyntax-only -cl-std=CL1.1 -fblocks -DBLOCKS
 // RUN: %clang_cc1 %s -verify -fsyntax-only -cl-std=CL1.2 -fblocks -DBLOCKS
 // RUN: %clang_cc1 %s -triple amdgcn--amdhsa -x c -std=c99 -verify -fsyntax-only
-// RUN: %clang_cc1 -cl-std=CL1.1 -cl-strict-aliasing %s 2>&1 | FileCheck --check-prefix=CHECK-INVALID-OPENCL-VERSION11 %s
-// RUN: %clang_cc1 -cl-std=CL1.2 -cl-strict-aliasing %s 2>&1 | FileCheck --check-prefix=CHECK-INVALID-OPENCL-VERSION12 %s
+// RUN: %clang_cc1 -cl-std=CL1.1 -cl-strict-aliasing -fblocks %s 2>&1 | FileCheck --check-prefix=CHECK-INVALID-OPENCL-VERSION11 %s
+// RUN: %clang_cc1 -cl-std=CL1.2 -cl-strict-aliasing -fblocks %s 2>&1 | FileCheck --check-prefix=CHECK-INVALID-OPENCL-VERSION12 %s
 // RUN: %clang_cc1 -cl-std=CL2.0 -cl-strict-aliasing %s 2>&1 | FileCheck --check-prefix=CHECK-INVALID-OPENCL-VERSION20 %s
 
 void f(void (^g)(void)) {
 #ifdef __OPENCL_C_VERSION__
 #if __OPENCL_C_VERSION__ < CL_VERSION_2_0 && !defined(BLOCKS)
   // expected-error@-3{{blocks support disabled - compile with -fblocks or for OpenCL 2.0 or above}}
 #else
   // expected-no-diagnostics
 #endif
 #else
   // expected-error@-8{{blocks support disabled - compile with -fblocks or pick a deployment target that supports them}}
 #endif
 }
 
 // CHECK-INVALID-OPENCL-VERSION11: warning: OpenCL version 1.1 does not support the option '-cl-strict-aliasing'
 // CHECK-INVALID-OPENCL-VERSION12: warning: OpenCL version 1.2 does not support the option '-cl-strict-aliasing'
-// CHECK-INVALID-OPENCL-VERSION20: warning: OpenCL version 2.0 does not support the option '-cl-strict-aliasing'
+// CHECK-INVALID-OPENCL-VERSION20: warning: OpenCL version 2.0 does not support the option '-cl-strict-aliasing'