fstests: add commit IDs for kernel fixes already merged upstream

Replace the commit ID stubs for btrfs/301, generic/211 and generic/771
with the commit IDs in Linus' tree.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>
3 files changed