linux 3.4.91

Signed-off-by: houst0nn <houstonn@gmail.com>

Conflicts:
	arch/arm/boot/compressed/Makefile
	arch/arm/boot/compressed/head.S
	drivers/mmc/host/sdhci.c
	fs/ext4/xattr.c
	include/net/tcp.h
	kernel/events/core.c

Change-Id: I4d4a27a1c95042f1579327973680b5102e630dff