remove -d from cp for osx compat.

tools/tinderbox/post-mozilla-rel.pl

@@ -651,7 +651,7 @@ sub main {
   if ($cachebuild) { 
     # remove saved builds older than a week and save current build
     TinderUtils::run_shell_command "find $mozilla_build_dir -type d -name \"200*-*\" -prune -mtime +7 -print | xargs rm -rf";
-    TinderUtils::run_shell_command "cp -rdpf $upload_directory $mozilla_build_dir/$datestamp";
+    TinderUtils::run_shell_command "cp -rpf $upload_directory $mozilla_build_dir/$datestamp";
 
     unlink "last-built";
     open BLAH, ">last-built";