apply-patches: run patch in batch mode

If the file to be patched is missing, then `patch' will interactively
ask for a file to be patched. This is annoying in e.g. the autobuilders
because they have to wait for a timeout instead of failing.

Giving the '-t' (batch mode) option to patch fixes this: it will skip the
missing file, and return a non-zero exit code. So the build cleanly
fails.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>