Gnumeric allows users to write macros/scripts in python.
That was unavailable in the previous version. Gnumeric's configure
script would see pygobject missing and disable it. With this
commit, users can do --with-pygobject and enable it.
(I'd prefer that the option was named "--with-python" but I didn't
know how to do that.)
ClosesHomebrew/homebrew#29433.
Signed-off-by: Adam Vandenberg <flangy@gmail.com>