Restored pyocd-gdbserver --version option lost in merge from master.
Restored pyocd-gdbserver --version option lost in merge from master.

Signed-off-by: Chris Reed <ddbbf6166888b293a1c3f06933a7a3227dbb7a9f@freescale.com>

wjzhang/pyOCD,matthewelse/pyOCD,wjzhang/pyOCD,c1728p9/pyOCD,tgarc/pyOCD,matthewelse/pyOCD,c1728p9/pyOCD,mesheven/pyOCD,devanlai/pyOCD,wjzhang/pyOCD,pyocd/pyOCD,devanlai/pyOCD,mbedmicro/pyOCD,bridadan/pyOCD,0xc0170/pyOCD,matthewelse/pyOCD,adamgreen/pyOCD,adamgreen/pyOCD,tgarc/pyOCD,bridadan/pyOCD,mbedmicro/pyOCD,pyocd/pyOCD,tgarc/pyOCD,oliviermartin/pyOCD,oliviermartin/pyOCD,flit/pyOCD,adamgreen/pyOCD,mesheven/pyOCD,bridadan/pyOCD,flit/pyOCD,oliviermartin/pyOCD,0xc0170/pyOCD,0xc0170/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,devanlai/pyOCD,c1728p9/pyOCD