firefox: update to 4.0.

srcpkgs/firefox/patches/firefox-version.patch

@@ -1,11 +1,12 @@
---- browser/installer/Makefile.in.ver	2009-07-18 13:32:35.000000000 +0200
-+++ browser/installer/Makefile.in	2009-07-18 13:33:12.000000000 +0200
+diff -Nur mozilla-2.0.orig//browser/installer/Makefile.in mozilla-2.0/browser/installer/Makefile.in
+--- mozilla-2.0.orig//browser/installer/Makefile.in	2011-03-03 14:11:20.000000000 -0800
++++ mozilla-2.0/browser/installer/Makefile.in	2011-03-13 10:08:45.896702838 -0700
 @@ -43,6 +43,8 @@
  
  include $(DEPTH)/config/autoconf.mk
  
-+MOZ_APP_VERSION="3.6"
++MOZ_APP_VERSION="4.0"
 +
- NO_PKG_FILES = \
- 	$(MOZ_APP_NAME)-config \
- 	$(MOZ_APP_NAME)-bin.elf \
+ include $(topsrcdir)/config/rules.mk
+ 
+ MOZ_PKG_REMOVALS = $(srcdir)/removed-files.in