Add ppc64le architecture

This commit adds PowerPC64 Little Endian atchitecture

Signed-off-by: Dinar Valeev <dvaleev@suse.com>
parse sourcemedium/debugmedium for kiwi product builds
Start emulator VM after unmounting VM image

Start the emulator like all other VMs, especially _after_ unmounting the
VM image.  Remove the sync that was just a workaround for this bug.
Make sure the /dev/shm mount point exists