btrfs/284: list a couple btrfs-progs git commits

btrfs/284: list a couple btrfs-progs git commits

This test may often fail when running with btrfs-progs versions not very
recent. The corresponding git commits in btrfs-progs that fix issues
uncovered by this test are:

1) 6f4a51886b37 ("btrfs-progs: receive: fix silent data loss after fall back from encoded write")
   Introduced in btrfs-progs v6.0.2;

2) e3209f8792f4 ("btrfs-progs: receive: fix a corruption when decompressing zstd extents"")
   Introduced in btrfs-progs v6.2.

So add the corresponding _fixed_by_git_commit calls to the test.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>