lang/python27: re-add _tkinter into the distribution
x11-toolkits/py-tkinter is otherwise built separately, ie disabled
in the main Python distribution build, due to circular (build)
dependencies with Python itself in lang/tk*. Since this Python
version is never default anymore, having been EOLed for years among
other things, it is safe to re-add _tkinter as part of the main
distribution build. Also update pkg-message to reflect extension
module ports unavailability.
This is to benefit the only remaining consumer, games/renpy, as
x11-toolkits/py-tkinter transitions to Python 3+ only. The relevant
OPTION has been removed as having _tkinter always present makes the
option a no-op.
PR: 268283
UnifiedSplitRaw
