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/
#
# Makefile.mingw
#
# Description: Makefile for perl plugin loader plugin.
#
PIDGIN_TREE_TOP := ../../..
include $(PIDGIN_TREE_TOP)/libpurple/win32/global.mak
##
## TARGET DEFINITIONS
##
.PHONY: all install clean
all:
$(MAKE) -C ./common -f $(MINGW_MAKEFILE)
install: all $(PIDGIN_INSTALL_PLUGINS_DIR)
$(MAKE) -C ./common -f $(MINGW_MAKEFILE) install
##
## CLEAN RULES
##
clean:
$(MAKE) -C ./common -f $(MINGW_MAKEFILE) clean