Another fix for AppVeyor
Another fix for AppVeyor

Usually the `master` branch already exists, so we'll have to force
the creation/reset of the branch.

sillsdev/libpalaso,gmartin7/libpalaso,sillsdev/libpalaso,sillsdev/libpalaso,gmartin7/libpalaso,sillsdev/libpalaso,gmartin7/libpalaso,gmartin7/libpalaso