libubox: update to git HEAD

 9e52171 blobmsg: introduce BLOBMSG_CAST_INT64

Signed-off-by: Daniel Golle <[email protected]>

package/libs/libubox/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/libubox.git
-PKG_MIRROR_HASH:=cb941cd33f43b38ef1a1f2b4fd212e0bb21c100dcdd2ab1976f8cc2071566d32
-PKG_SOURCE_DATE:=2020-07-11
-PKG_SOURCE_VERSION:=f4e9bf73ac5c0ee6b8f240e2a2100e70ca56d705
+PKG_MIRROR_HASH:=cf963b19f5a25da85b2d8888514cbcc33c3f641c4478c9c25312b8bf83fe9e6b
+PKG_SOURCE_DATE:=2020-08-06
+PKG_SOURCE_VERSION:=9e52171d70def760a6949676800d0b73f85ee22d
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=ISC