Prepare v2013.04-rc4

Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/Makefile b/Makefile
index 07abef4..b09bfcc 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@
 VERSION = 2013
 PATCHLEVEL = 10
 SUBLEVEL =
-EXTRAVERSION = -rc3
+EXTRAVERSION = -rc4
 ifneq "$(SUBLEVEL)" ""
 U_BOOT_VERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 else