pidgin/pidgin

Appease intltool-update --maintain

2017-01-08, Mark Doliner
f75c2233918a
Appease intltool-update --maintain

The .in.in file was added to the repo in 8bdfa6a4e56f. Then Gary added the .in file to POTFILES.in in 1d98555... but I think it should actually be the .in.in file, right?
installed_m4=purple.m4
EXTRA_DIST=$(installed_m4) as-ac-expand.m4
m4datadir=$(datadir)/aclocal
m4data_DATA=$(installed_m4)