pidgin/pidgin

Revert my previous change.

2017-01-08, Mark Doliner
7ccb54f5d342
Revert my previous change.

Apparently it caused `make distcheck` to fail which caused a Bitbucket build pipeline to fail: https://bitbucket.org/pidgin/main/addon/pipelines/home#!/results/%7B9f059724-78b4-4a5e-9780-9a614c7c2742%7D

Not sure how to fix this.

FYI there's a daily cronjob on... rock? in that calls /srv/trac/developer.pidgin.im/mercurial_support/nightly_update.sh which updates https://developer.pidgin.im/l10n/ It's been failing for a few months.
EXTRA_DIST = \
Makefile.mingw \
README
pkgdir = @PURPLE_PLUGINDIR@
NULLSOURCES = \
nullprpl.h \
nullprpl.c
AM_CFLAGS = $(st)
libnull_la_LDFLAGS = -module @PLUGIN_LDFLAGS@
# nullprpl isn't built by default; when it is built, it's dynamically linked
st =
pkg_LTLIBRARIES = libnull.la
libnull_la_SOURCES = $(NULLSOURCES)
libnull_la_LIBADD = @PURPLE_LIBS@
AM_CPPFLAGS = \
-I$(top_srcdir)/libpurple \
-I$(top_builddir)/libpurple \
$(GLIB_CFLAGS) \
$(GPLUGIN_CFLAGS) \
$(DEBUG_CFLAGS)