pidgin/pidgin

Merged in Robbie/pidgin/release-2.x.y (pull request #160)
release-2.x.y
2017-02-18, Gary Kramlich
9f4a1085a774
Merged in Robbie/pidgin/release-2.x.y (pull request #160)

New DevID and DistID (2.x.y)

Approved-by: Gary Kramlich
Approved-by: Mike Ruprecht
Approved-by: dx
installed_m4=purple.m4
EXTRA_DIST=$(installed_m4)
m4datadir=$(datadir)/aclocal
m4data_DATA=$(installed_m4)