Migrator: ignore getbranch-* packages

getbranch package name changes so it contains branch name. Not ignoring
it results to collision when branch is changed.
2 jobs for migrator-getbranch in 3 minutes and 22 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed test #3222

00:03:11

passed test_busybox #3223

00:03:22