libubox: update to the latest version, fixes a fd deletion race condition in uloop

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 37629

package/libs/libubox/Makefile

@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libubox
-PKG_VERSION:=2013-07-29
+PKG_VERSION:=2013-08-01
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=git://nbd.name/luci2/libubox.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=ef9b6b92df223e783a365f34998bc0f299b977f2
+PKG_SOURCE_VERSION:=04f194aa8a04926fe7f2e42bbf9ba6c62d49339e
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MIRROR_MD5SUM:=
 CMAKE_INSTALL:=1