Fix subdir part of GIMP sites.

Make sure we only select the two numeric values of the version. I tested
this with the gimp update but gimp overwrites the master_site_subdir value.
Restore the UNAME_M fix which was accidently reverted in the gnome3 import.
This fixes the build on architechtures where MACHINE and MACHINE_ARCH to
differ. But put it in the -common port so it shared between both versions
of py-gobject3. [1]

Work around python plist issue [2]

PR:		188856 [1], 195342 [2], 195738 [2], 195748 [2]
Sumbitted by:	sbruno [1], mva[2]
misc/mc: really re-add small patch that was deleted in r369133

Thanks to tijl: patch syntax was bogus and was ignored.

PR:		194627
- Update to 2.2.6
Update "BSD" license in multimedia category
Update flash plugin to 11.2r202.418

PR:		195825
Submitted by:	pkubaj@riseup.net
Use new GIMP master sites macro.
Drop :keepla from USES=libtool.
Switch logic in the SIMD option in babl.
- Fix build with python
- Fix plist

PR:		195803