pidgin/pidgin

Fix a typo. Thanks, Maiku.
release-2.x.y
2016-10-12, Robert Vehse
3118251ccdef
Fix a typo. Thanks, Maiku.
installed_m4=purple.m4
EXTRA_DIST=$(installed_m4)
m4datadir=$(datadir)/aclocal
m4data_DATA=$(installed_m4)