Merge pull request #674 from mangupta/fix_dtests_on_nvcc

[dtests] Fix hipTestClock, hipTestNew, hipTestGlobalVariable, hipSimpleAtomicsTest & hipTestIncludeMath tests on nvcc path

include/hip/nvcc_detail/hip_runtime.h

@@ -118,6 +118,9 @@ typedef int hipLaunchParm;
     }
 #endif
 
+#define __clock() clock()
+#define __clock64() clock64()
+
 #endif
 
 #endif