[Midnightbsd-cvs] src: Makefile: Fix clean target with the external dist directory we're

[laffer1 at midnightbsd.org]

Log Message:
-----------
Fix clean target with the external dist directory we're using now.

Modified Files:
--------------
    src/release:
        Makefile (r1.35 -> r1.36)
        (http://cvsweb.midnightbsd.org/src/release/Makefile?r1=1.35&r2=1.36)