Initial commit for GCC 4.8

Signed-off-by: kecinzer <kecinzer@gmail.com>

Conflicts:
	Makefile
	arch/arm/kernel/return_address.c
Linaro 4.8 fixes

Conflicts:
	arch/arm/boot/compressed/Makefile
	arch/arm/lib/memset.S
	drivers/usb/gadget/f_qdss.c
	fs/namespace.c
	net/bluetooth/hci_conn.c
	net/unix/af_unix.c