libubox: fix a variable handling regression in jshn

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

SVN-Revision: 43351

package/libs/libubox/Makefile

@@ -7,7 +7,7 @@ PKG_RELEASE=$(PKG_SOURCE_VERSION)
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=http://git.openwrt.org/project/libubox.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=0bfb44f590402137bfcf8e65c54638908d5ed6d2
+PKG_SOURCE_VERSION:=f09ae76445e32511433fdab0a1bcda73aa84986d
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MIRROR_MD5SUM:=
 CMAKE_INSTALL:=1