3.18-stable patches

3.18-stable patches

added patches:
	btrfs-fix-memory-leak-in-update_space_info-failure-path.patch
	btrfs-use-correct-types-for-page-indices-in-btrfs_page_exists_in_range.patch
	cpuset-consider-dying-css-as-offline.patch
	dmaengine-ep93xx-always-start-from-base0.patch
	drivers-char-random-add-get_random_long.patch
	ext4-fix-seek_hole.patch
	ext4-keep-existing-extra-fields-when-inode-expands.patch
	iio-proximity-as3935-fix-as3935_int-mask.patch
	random-properly-align-get_random_int_hash.patch
	stackprotector-increase-the-per-task-stack-canary-s-random-range-from-32-bits-to-64-bits-on-64-bit-platforms.patch
	staging-lustre-lov-remove-set_fs-call-from-lov_getstripe.patch
	usb-chipidea-debug-check-before-accessing-ci_role.patch
	usb-chipidea-udc-fix-null-pointer-dereference-if-udc_start-failed.patch
	usb-gadget-f_mass_storage-serialize-wake-and-sleep-execution.patch