pidgin/pidgin

Install our appdata file to $(datadir)/metainfo as that change was made a long time ago

This patch originates from Lars Wendler from Gentoo

https://gitweb.gentoo.org/repo/gentoo.git/commit/net-im/pidgin/files/pidgin-2.13.0-metainfo.patch?id=2dd6c1852251b5b67c3045badf173be9535b97a9

Testing Done:
Installed to a prefix and verified the file ended up in `$prefix/share/metainfo`

Reviewed at https://reviews.imfreedom.org/r/607/
EXTRA_DIST = \
Makefile.mingw \
README \
TODO
pkgdir = $(libdir)/purple-$(PURPLE_MAJOR_VERSION)
SILCSOURCES = silc.c silcpurple.h buddy.c chat.c ft.c ops.c pk.c util.c wb.c wb.h
AM_CFLAGS = $(st)
libsilcpurple_la_LDFLAGS = -module -avoid-version
if STATIC_SILC
st = -DPURPLE_STATIC_PRPL $(SILC_CFLAGS)
noinst_LTLIBRARIES = libsilcpurple.la
libsilcpurple_la_SOURCES = $(SILCSOURCES)
libsilcpurple_la_CFLAGS = $(AM_CFLAGS)
libsilcpurple_la_LIBADD = $(SILC_LIBS)
else
st = $(SILC_CFLAGS)
pkg_LTLIBRARIES = libsilcpurple.la
libsilcpurple_la_SOURCES = $(SILCSOURCES)
libsilcpurple_la_LIBADD = $(GLIB_LIBS) $(SILC_LIBS)
endif
AM_CPPFLAGS = \
-I$(top_srcdir)/libpurple \
-I$(top_builddir)/libpurple \
$(DEBUG_CFLAGS) \
$(GLIB_CFLAGS) \
$(SILC_CFLAGS)