[Midnightbsd-cvs] mports: Makefile: minor fixes to improve compatibility with other ports

[laffer1 at midnightbsd.org]

Log Message:
-----------
minor fixes to improve compatibility with other ports

Modified Files:
--------------
    mports/graphics/gd:
        Makefile (r1.5 -> r1.6)
        (http://cvsweb.midnightbsd.org/mports/graphics/gd/Makefile?r1=1.5&r2=1.6)