pidgin/pidgin

Fix an issue where we would get a warning about gplugin.pc not found while generating gir files

Testing Done:
built the gir's and made sure the warning was gone.

Reviewed at https://reviews.imfreedom.org/r/151/
[wrap-hg]
directory = talkatu
url = https://keep.imfreedom.org/talkatu/talkatu
revision = default