Patch from: Bill Nottingham <notting@redhat.com>

diff -up mozilla-release/browser/base/Makefile.in.fu mozilla-release/browser/base/Makefile.in
--- mozilla-release/browser/base/Makefile.in.fu	2011-06-24 16:50:23.802042086 -0400
+++ mozilla-release/browser/base/Makefile.in	2011-06-24 16:50:42.324042096 -0400
@@ -62,7 +62,7 @@ EXTRA_JS_MODULES = \
 
 include $(topsrcdir)/config/rules.mk
 
-PRE_RELEASE_SUFFIX := ""
+PRE_RELEASE_SUFFIX :=
 
 DEFINES += \
 	-DMOZ_APP_VERSION=$(MOZ_APP_VERSION) \