support/testing: update git tests
Replace the names of the tarballs in the hash files to -git3.
We don't have any symlinks in the tests, so the hashes themselves don't
change.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>