Fix bug: frdmk82f gdb reported an warning when connecting
Fix bug: frdmk82f gdb reported an warning when connecting

gdb could not recognize 'L' in hexadecimal number. In the other hand,
python may generate 'L' in hexadecimal number when using hex() built-in
function. To ensure the hexadecimal number format is conformed to gdb
restriction, I remove 'L' from the end of result generated by hex().

flit/pyOCD,wjzhang/pyOCD,pyocd/pyOCD,matthewelse/pyOCD,mesheven/pyOCD,flit/pyOCD,matthewelse/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,wjzhang/pyOCD,pyocd/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,wjzhang/pyOCD,mbedmicro/pyOCD,matthewelse/pyOCD