pidgin/pidgin

Fix POTFILES.in that was broken in /r/1925

20 months ago, Gary Kramlich
613d42be784e
Fix POTFILES.in that was broken in /r/1925

Testing Done:
ran `ninja pidgin-pot`

Reviewed at https://reviews.imfreedom.org/r/2006/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$
^subprojects\/.+\/