ports/150609: [bsd.gcc.mk]: support overriding gcc/g++

[edwin at FreeBSD.org]

Synopsis: [bsd.gcc.mk]: support overriding gcc/g++

Responsible-Changed-From-To: freebsd-ports-bugs->gerald
Responsible-Changed-By: edwin
Responsible-Changed-When: Thu Sep 16 01:50:10 UTC 2010
Responsible-Changed-Why: 
bsd.gcc.mk is gerald territory (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=150609