package/libubox: bump version to 75a3b87

Changelog:

  - be3dc7223a6d uloop: avoid integer overflow in tv_diff
  - 123e976f3d01 uloop: restore return type of uloop_timeout_remaining
  - 334415738150 uloop: add uloop_timeout_remaining64
  - c87d3e1fb67d lua/uloop: use uloop_timeout_remaining64
  - c86a894ec63d uloop: deprecate uloop_timeout_remaining
  - cce5e351278b vlist: define vlist_for_each_element_safe
  - f2d6752901f2 blob: clear buf->head when freeing a buffer
  - 45210ce14136 list.h: add container_of_safe macro
  - cfa372ff8aed blobmsg: implicitly reserve space for 0-terminator in string buf alloc
  - d2223ef9da71 blobmsg: work around false positive gcc -Warray-bounds warnings
  - ea56013409d5 jshn.sh: add json_add_fields function for adding multiple fields at once
  - b09b316aeaf6 blobmsg: add blobmsg_parse_attr function
  - eac92a4d5d82 blobmsg: add blobmsg_parse_array_attr
  - ef5e8e38bd38 usock: fix poll return code check
  - 6fc29d1c4292 jshn.sh: Add pretty-printing to json_dump
  - 5893cf78da40 blobmsg: Don't do at run-time what can be done at compile-time
  - 362951a2d96e uloop: fix uloop_run_timeout
  - 75a3b870cace uloop: add support for integrating with a different event loop

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libubox/libubox.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256  54f65299439dab4be8f203588bcefd9b60052ae87d12c6d012f6278a2a111b4e  libubox-d716ac4bc4236031d4c3cc1ed362b502e20e3787-br1.tar.gz
+sha256  b06311e7d857583303e9256f58787857944572012fbfd4a5d83e92e0e684f654  libubox-75a3b870cace1171faf57bd55e5a9a2f1564f757-br1.tar.gz

package/libubox/libubox.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBUBOX_VERSION = d716ac4bc4236031d4c3cc1ed362b502e20e3787
+LIBUBOX_VERSION = 75a3b870cace1171faf57bd55e5a9a2f1564f757
 LIBUBOX_SITE = https://git.openwrt.org/project/libubox.git
 LIBUBOX_SITE_METHOD = git
 LIBUBOX_LICENSE = ISC, BSD-3-Clause