git-p4: Fix sync errors due to new server version

Fix sync errors due to new Perforce servers.

The P4D/NTX64/2009.2/228098 (2009/12/16) server reports
'move/delete' instead of 'delete'. This causes the Perforce
depot and the git repo to get out of sync. Fixed by adding
the new status string.
Signed-off-by: NPal-Kristian Engstad <pal_engstad@naughtydog.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

contrib/fast-import/git-p4

@@ -1037,7 +1037,7 @@ class P4Sync(Command):
 
             if includeFile:
                 filesForCommit.append(f)
-                if f['action'] not in ('delete', 'purge'):
+                if f['action'] not in ('delete', 'move/delete', 'purge'):
                     filesToRead.append(f)
                 else:
                     filesToDelete.append(f)