Support performance tests while direct tests commands keep unchanged.
To build performance tests, run "make build_perf".
To run all performance testis, run "make perf".
To run specific tests, for example, run
/usr/bin/ctest -C performance -R performance_tests/perfDispatch --verbose
To run individual test, for example, run
performance_tests/memory/hipPerfMemMallocCpyFree
Change-Id: I168c1b9ef1ec21b392d48648d0c71e8fbd37d57b
Tao Sang