profiles: Mask unmaintained dev-python/pygtk revdeps for removal

profiles: Mask unmaintained dev-python/pygtk revdeps for removal

Unmaintained revdeps on dev-python/pygtk blocking its removal, py2-only
All masked for removal in 30 days.
Last release in 2011, bug #708106
app-cdr/gtkcdlabel

No plans upstream to port away from pygtk, suggested alternative dupeguru
not packaged in Gentoo, bug #708112
app-misc/fslint

Last release in 2012, bug #708124
app-text/keepnote

Last release in 2012, bug #708142
x11-misc/revelation

Last release in 2011, bug #708150
x11-misc/tintwizard

Last activity in 2013, bug #710162
sci-misc/pythoncad

Last release in 2013, bug #710164
sci-electronics/gresistor

Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>