shrink-revlog: preserve mode of the shrunken index and data file.

Otherwise, the shrunken index file always has mode 0600 thanks to
mkstemp(). This is annoying on a server, where multiple users may need
to read/write the manifest. chmod()ing the data file is not strictly
necessary, but it's nice for consistency.

contrib/shrink-revlog.py

@@ -202,9 +202,14 b' def shrink(ui, repo, **opts):'
             # copy files
             util.os_link(indexfn, oldindexfn)
             ignoremissing(util.os_link)(datafn, olddatafn)
+
+            # mkstemp() creates files only readable by the owner
+            os.chmod(tmpindexfn, os.stat(indexfn).st_mode)
+
             # rename
             util.rename(tmpindexfn, indexfn)
             try:
+                os.chmod(tmpdatafn, os.stat(datafn).st_mode)
                 util.rename(tmpdatafn, datafn)
             except OSError, inst:
                 if inst.errno != errno.ENOENT: