4.5-stable patches

4.5-stable patches

added patches:
	btrfs-add-check-to-sysfs-handler-of-label.patch
	btrfs-add-read-only-check-to-sysfs-handler-of-features.patch
	btrfs-add-write-protection-to-set_features-ioctl.patch
	btrfs-allow-balancing-to-dup-with-multi-device.patch
	btrfs-avoid-overflowing-f_bfree.patch
	btrfs-bugfix-handle-fs_ioc32_-getflags-setflags-getversion-in-btrfs_ioctl.patch
	btrfs-do-not-create-empty-block-group-if-we-have-allocated-data.patch
	btrfs-fix-divide-error-upon-chunk-s-stripe_len.patch
	btrfs-fix-empty-symlink-after-creating-symlink-and-fsync-parent-dir.patch
	btrfs-fix-for-incorrect-directory-entries-after-fsync-log-replay.patch
	btrfs-fix-fspath-error-deallocation.patch
	btrfs-fix-int32-overflow-in-shrink_delalloc.patch
	btrfs-fix-lock-dep-warning-move-scratch-dev-out-of-device_list_mutex-and-uuid_mutex.patch
	btrfs-fix-lock-dep-warning-move-scratch-super-outside-of-chunk_mutex.patch
	btrfs-fix-memory-leak-during-raid-5-6-device-replacement.patch
	btrfs-fix-mixed-block-count-of-available-space.patch
	btrfs-fix-unexpected-return-value-of-fiemap.patch
	btrfs-make-state-preallocation-more-speculative-in-__set_extent_bit.patch
	btrfs-pass-the-right-error-code-to-the-btrfs_std_error.patch
	btrfs-remove-bug_on-s-in-btrfs_map_block.patch
	btrfs-scrub-set-bbio-to-null-before-calling-btrfs_map_block.patch