strace: upgrade to 4.9, supports ARC

Also get rid of the backport patches which are already present upstream.

Tested on ARC with LFS

[Peter: drop incomplete !LFS patch, depend on BR2_LARGEFILE]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: arc-linux-dev@synopsys.com
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>