[Midnightbsd-cvs] mports: Makefile: modernize

[laffer1 at midnightbsd.org]

Log Message:
-----------
modernize

Modified Files:
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    mports/x11-toolkits/gtk20:
        Makefile (r1.29 -> r1.30)
        (http://cvsweb.midnightbsd.org/mports/x11-toolkits/gtk20/Makefile?r1=1.29&r2=1.30)