incoming: write after checksum tester

From D.J.Wong

Signed-off-by: David Sterba <dsterba@suse.cz>
incoming: fileflags utility

Signed-off-by: David Sterba <dsterba@suse.cz>
incoming: clone_range utility

Signed-off-by: David Sterba <dsterba@suse.cz>
incoming: leveldb on btrfs snapshot tester

From A. Oliva, released under GPL3.

Signed-off-by: David Sterba <dsterba@suse.cz>
Add DATA_SOURCES files

Signed-off-by: David Sterba <dsterba@suse.cz>
test: parallel fsmark

16 threads writing files

Signed-off-by: David Sterba <dsterba@suse.cz>
incoming: snapstorm

Signed-off-by: David Sterba <dsterba@suse.cz>
incoming: rewrite-file

Signed-off-by: David Sterba <dsterba@suse.cz>
incoming: creat_unlink

Create logs of short-lived files.

Signed-off-by: David Sterba <dsterba@suse.cz>