Change return value for _papi_hwd_ntv_code_to_descr from char * to int to reflect updated calling sequence.
Change return value for _papi_hwd_ntv_code_to_descr from char * to int
to reflect updated calling sequence.

pyrovski/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi