Account for calling convention specifiers in function definitions in IR test cases

Several tests wouldn't pass when executed on an armv7a_pc_linux triple
due to the non-default arm_aapcs calling convention produced on the
function definitions in the IR output. Account for this with the
application of a little regex.

Patch by Ying Yi.

llvm-svn: 240971
diff --git a/clang/test/CodeGenOpenCL/event_t.cl b/clang/test/CodeGenOpenCL/event_t.cl
index ddf12a9..a84d8bb 100644
--- a/clang/test/CodeGenOpenCL/event_t.cl
+++ b/clang/test/CodeGenOpenCL/event_t.cl
@@ -6,7 +6,7 @@
   event_t e;
 // CHECK: alloca %opencl.event_t*,
   foo(e);
-// CHECK: call void @foo(%opencl.event_t* %
+// CHECK: call {{.*}}void @foo(%opencl.event_t* %
   foo(0);
-// CHECK: call void @foo(%opencl.event_t* null)
+// CHECK: call {{.*}}void @foo(%opencl.event_t* null)
 }