Rename COPYING to LICENSE

See fdroidclient#384
Status Job ID Name Coverage
  Test
failed #196843
metadata_check

00:05:22

 
Name Stage Failure
failed
metadata_check Test There is an unknown failure, please try again
Setting up python-magic (1:5.22+15-2) ...
Processing triggers for python-support (1.0.15) ...
$ test -d fdroidserver && rm -rf fdroidserver
$ git clone https://gitlab.com/fdroid/fdroidserver.git fdroidserver --depth=10
Cloning into 'fdroidserver'...
error: RPC failed; result=22, HTTP code = 502
fatal: The remote end hung up unexpectedly

ERROR: Build failed with: exit code 128