pidgin/pidgin

Fix up the dependencies for our gir files and ensure ours will work as a subproject

Testing Done:
Tested against gplugin 0.34.1 and everything is working well.

Reviewed at https://reviews.imfreedom.org/r/942/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$