add util.samestat function for windows.
windows does not have os.path.samestat, and stat().st_ino is always zero,
so util.samestat always returns false on windows.
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1 files, 1 changesets, 1 total revisions
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
verify failed
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
commit failed