[Comgr] Add test for Comgr Profiler (llvm#2676)

Author: lamb-j

amd/comgr/test-lit/time-statistics.cl

@@ -0,0 +1,7 @@
+// COM: Check for any runtime errors with the Comgr Profilier
+// RUN: AMD_COMGR_TIME_STATISTICS=1 compile-minimal-test %s %t.bin
+// RUN: test -f PerfStatsLog.txt
+
+void kernel add(__global float *A, __global float *B, __global float *C) {
+    *C = *A + *B;
+}