Disable incomplete unit tests that don't work on nvcc path

Change-Id: If5823ec96a3b2497a08c46ab802c5a0158271053


[ROCm/hip commit: 305592d622]

projects/hip/tests/src/deviceLib/hipMathFunctions.cpp

@@ -21,7 +21,7 @@ THE SOFTWARE.
 */
 
 /* HIT_START
- * BUILD: %t %s ../test_common.cpp
+ * BUILD: %t %s ../test_common.cpp EXCLUDE_HIP_PLATFORM nvcc
  * RUN: %t
  * HIT_END
  */

projects/hip/tests/src/deviceLib/hipTestHalf.cpp

@@ -18,7 +18,7 @@ THE SOFTWARE.
 */
 
 /* HIT_START
- * BUILD: %t %s ../test_common.cpp
+ * BUILD: %t %s ../test_common.cpp EXCLUDE_HIP_PLATFORM nvcc
  * RUN: %t
  * HIT_END
  */