[Midnightbsd-cvs] mports: Makefile: make some dependancy changes after migrating png

[laffer1 at midnightbsd.org]

Log Message:
-----------
make some dependancy changes after migrating png

Modified Files:
--------------
    mports/databases/rrdtool:
        Makefile (r1.10 -> r1.11)
        (http://cvsweb.midnightbsd.org/mports/databases/rrdtool/Makefile?r1=1.10&r2=1.11)