Update devel/flatzebra and dependent ports :

devel/flatzebra [1]:

• Update to 0.1.6
• Use new Makefile header format
• Replace USE_GNOME by proper USE_PKGCONFIG
• Switch to OptionsNG

games/afternoonstalker:

• Update to 1.1.5
• Use new Makefile header format

games/burgerspace:

• Update to 1.9.2
• Use new Makefile header format

games/cosmosmash:

• Update to 1.4.6
• Use new Makefile header format

PR: ports/177730 [1]
Approved by: edwin (maintainer) [1]
Feature safe: yes