[Midnightbsd-cvs] src: Makefile: Use SUBDIR rather that dynamically set vars

[laffer1 at midnightbsd.org]

Log Message:
-----------
Use SUBDIR rather that dynamically set vars

Modified Files:
--------------
    src/bin:
        Makefile (r1.17 -> r1.18)
        (http://cvsweb.midnightbsd.org/src/bin/Makefile?r1=1.17&r2=1.18)