pidgin/pidgin

833a9f17abd3
Set the default branch for review requests for the release-2.x.y branch

Testing Done:
Verified that the branch was set automatically in this review request.

Reviewed at https://reviews.imfreedom.org/r/440/
installed_m4=purple.m4
EXTRA_DIST=$(installed_m4)
m4datadir=$(datadir)/aclocal
m4data_DATA=$(installed_m4)