From a tweet (not the best way to report a problem):
CLDR 37a seems to be missing entries for:
[1F977 1F3FB] ninja: light skin tone
[1F977 1F3FC] ninja: medium-light skin tone
[1F977 1F3FD] ninja: medium skin tone
[1F977 1F3FE] ninja: medium-dark skin tone
[1F977 1F3FF] ninja: dark skin tone
The problem is that the emoji-test.txt file was not updated for the last data fix (to ninja). So GenerateDerivedAnnotations (which produces the names in the derivedAnnoations/ folder) didn't pick up the change.
Because ICU doesn't use this data, I recommend that we make the fix.