libubox: update to the latest version, fixes a runqueue use-after-free bug

7237302 md5: add "const" qualifier to the "file" argument
fa9937c json_script: enable custom expr handler callback
368fd26 uloop: allow specifying a timeout for uloop_run()
6a7fb7d runqueue: fix use-after-free bug
4bc3dec uloop: fix a regression in timeout handling
fd57eea uloop: allow passing 0 as timeout to uloop_run

Signed-off-by: Felix Fietkau <[email protected]>

package/libs/libubox/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/libubox.git
-PKG_SOURCE_DATE:=2017-02-24
-PKG_SOURCE_VERSION:=96305a3cafcc9c0df7f189567671bb26ce3eb129
-PKG_MIRROR_HASH:=19dc9f73621a65d1374427160f59e338db45ee6edc30edff6a6fee10dcdfc8b6
+PKG_SOURCE_DATE:=2017-06-17
+PKG_SOURCE_VERSION:=fd57eea9f37e447814afbf934db626288aac23c4
+PKG_MIRROR_HASH:=6921c507c0c7a951a47d619caa8228f7553141484a3c6d87ba526216f9dd927e
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=ISC