[Midnightbsd-cvs] src: Makefile.inc1: allow setting shell in the environment for the build

[laffer1 at midnightbsd.org]

Log Message:
-----------
allow setting shell in the environment for the build

Modified Files:
--------------
    src:
        Makefile.inc1 (r1.33 -> r1.34)
        (http://cvsweb.midnightbsd.org/src/Makefile.inc1?r1=1.33&r2=1.34)