busybox: update to 1.28.4

Signed-off-by: Magnus Kroken <mkroken@gmail.com>

package/utils/busybox/Makefile

@@ -8,14 +8,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
-PKG_VERSION:=1.28.3
-PKG_RELEASE:=3
+PKG_VERSION:=1.28.4
+PKG_RELEASE:=1
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://www.busybox.net/downloads \
 		http://sources.buildroot.net
-PKG_HASH:=ad0d22033f23e696f9a71a4c2f9210194dda39b024a79151f4ac278995332a6e
+PKG_HASH:=e3c14a3699dc7e82fed397392957afc78e37bdf25398ac38ead6e84621b2ae6a
 
 PKG_BUILD_DEPENDS:=BUSYBOX_USE_LIBRPC:librpc BUSYBOX_CONFIG_PAM:libpam
 PKG_BUILD_PARALLEL:=1