build.sh: new command line option
build.sh: new command line option

New command line option for autoresuming build:
./build.sh --clone --autoresume build.modules prefix

When build.modules doesn't exist it is equivalent to:
./build.sh --clone -f build.modules prefix

When build.modules does exist it is equivalent to:
./build.sh --clone -f build.modules -r `tail -n 1 build.modules` prefix

Signed-off-by: Mariusz Ceier <e26ca251612d8d2fb86d5eadb4884bc40919ecdc@gmail.com>
Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>

tmzt/androix-util-modular,freedesktop-unofficial-mirror/xorg__util__modular,tmzt/androix-util-modular,freedesktop-unofficial-mirror/xorg__util__modular,freedesktop-unofficial-mirror/xorg__util__modular