Update prebuilt su

v1.91

Signed-off-by: Andre Saddler <dresadd09691@gmail.com>

Conflicts:
	proprietary/common/bin/su

Change-Id: I265fa948460c7029a755796f82b44aab5db9dd97
squisher: Allow outfile to be overriden

Change-Id: Icbf27e574cd1919426a2166f4d99d4a02b636c18
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>

Conflicts:
	tools/squisher