Fix directory creation.

Remove a stale "exit" introduced by r354, causing sbopkg
to exit whenever a new directory is created.

Signed-off-by: Mauro Giachero <mauro.giachero@gmail.com>

src/usr/bin/sbopkg

@@ -108,7 +108,6 @@ ck_dir() {
         # sufficient permissions to create these directories.  For now,
         # the || exit 1 will suffice.
         mkdir -p $1 || exit 1
-        exit
     fi
 }