bitbake: toaster: --help now returns 0 instead of 1

If the user explicitly passes in "--help" then it should return 0. This
is the convention follow by the typical application. This allows the
user to check for options without triggering an error.

(Bitbake rev: 1d5102fe6c932dad1c2b975385e10a33a91ba1a4)

Signed-off-by: Randy Witt <randy.e.witt@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/toaster

@@ -203,6 +203,10 @@ for param in $*; do
                 ADDR_PORT="localhost:$PORT"
             fi
     ;;
+    --help)
+            echo "$HELP"
+            return 0
+    ;;
     *)
             echo "$HELP"
             return 1