Added missing ; in del_target which fixes #103

The missing ; makes the DEPPKG= line run together with the VS= line which makes it similar to this

FreeBSD 8.2 /bin/sh results:

    $  A=x B=$A;
    $  echo $A
    x
    $  echo $B

    $ 

The same with bash:

    $ A=x B=$A;
    $ echo $A
    x
    $ echo $B
    x
    $