package/libcrossguid: new package

Needed by Kodi 16.x-Jarvis:
https://github.com/xbmc/xbmc/commit/6f8171f53992fc2eaabf71f6fa47ebed1da0d43d



[Peter: needs GCC >= 4.7 for C+11, no need to install in target,
	Drop TARGET_CONFIGURE_OPTS, add TARGET_CXXFLAGS, wrap long lines]
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>