Add -x and -u options to papi_command_line to allow printing counter values in hexadecimal and unsigned formats.
Add -x and -u options to papi_command_line to allow printing counter values in hexadecimal and unsigned formats.

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