loop device parsing should have "dXpY_style = True" in order to
correctly parse partitions on loop devices.
Reasoning:
==========
Using losetup to create a virtual SD card disk into a loop device and
creating partitions for it results in new devices within an AppVM that
look like: /dev/loop0p1 /dev/loop0p2 and so on.
However as soon as they are created, Qubes Manager rises an exception
and becomes blocked with the following message (redacted):
"QubesException: Invalid device name: loop0p1
at line 639 of file /usr/lib64/python2.7/site-
packages/qubesmanager/main.py
Details:
line: raise QubesException....
func: block_name_to_majorminor
line no.: 181
file: ....../qubes/qubesutils.py
99315fd02c