Update to reflect PreBuild change.

tools/tinderbox/build-galeon.pl

@@ -45,6 +45,9 @@ sub checkout {
 }
 
 
+sub PreBuild {
+}
+
 sub main {
   my ($mozilla_build_dir) = @_;
 

tools/tinderbox/post-mozilla-l10n.pl

@@ -151,6 +151,9 @@ sub mail_locale_finished_message {
     }
 }
 
+sub PreBuild {
+}
+
 sub main {
     my ($mozilla_build_dir) = @_;