pidgin/pidgin

Add the unload parameter to a few plugins that I missed on the gplugin 0.35.0 update

Testing Done:
Compiled under ubuntu to verify that unity compiled without error.

Reviewed at https://reviews.imfreedom.org/r/1003/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$