test-convert-git: remove the read-only attribute of repository files
Git object files are stored read-only in the filesystem. Trying to remove a
read-only file on windows will fail with access denied, so we have to make them
writeable before they can be removed.
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved