Fixed Doxymacs not building on osx
Merge pull request #1434 from Herdinger/master

Fixed Doxymacs recipe for Osx
Add recipe for ggtags.

./test-recipe.sh ggtags => SUCCESS

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Merge pull request #1453 from ruediger/ggtags

Add recipe for ggtags.