ports/183599: [patch] audio/openal fix build with clang; support staging

[edwin at FreeBSD.org]

Synopsis: [patch] audio/openal fix build with clang; support staging

State-Changed-From-To: open->feedback
State-Changed-By: edwin
State-Changed-When: Sat Nov 2 18:40:08 UTC 2013
State-Changed-Why: 
Awaiting maintainers feedback (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=183599