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

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.

Patch by Martin Böhme!

Differential Revision: http://reviews.llvm.org/D22349

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@275405 91177308-0d34-0410-b5e6-96231b3b80d8

test/Frontend/lit.local.cfg

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

test/Frontend/opencl.cl

@@ -6,8 +6,8 @@
 // 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)) {
@@ -24,4 +24,4 @@ void f(void (^g)(void)) {
 
 // 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'
\ No newline at end of file
+// CHECK-INVALID-OPENCL-VERSION20: warning: OpenCL version 2.0 does not support the option '-cl-strict-aliasing'