Worked around import loop in cmsis_pack.py.
Worked around import loop in cmsis_pack.py.

mbedmicro/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,flit/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,pyocd/pyOCD,mesheven/pyOCD,pyocd/pyOCD,flit/pyOCD