package/libopenh264: security bump to version 2.5.1

Fixes the following security issue:

CVE-2025-27091: OpenH264 Decoding Functions Heap Overflow Vulnerability

A vulnerability in the decoding functions of OpenH264 codec library could
allow a remote, unauthenticated attacker to trigger a heap overflow.

This vulnerability is due to a race condition between a Sequence Parameter
Set (SPS) memory allocation and a subsequent non Instantaneous Decoder
Refresh (non-IDR) Network Abstraction Layer (NAL) unit memory usage.  An
attacker could exploit this vulnerability by crafting a malicious bitstream
and tricking a victim user into processing an arbitrary video containing the
malicious bitstream.  An exploit could allow the attacker to cause an
unexpected crash in the victim's user decoding client and, possibly, perform
arbitrary commands on the victim's host by abusing the heap overflow.

https://github.com/cisco/openh264/security/advisories/GHSA-m99q-5j7x-7m9x
https://github.com/cisco/openh264/releases/tag/2.5.1

The upstream tag now has no 'v' prefix, so drop it from _SITE.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit a7aeb5a46eaaf8a39560c8664593018cf253835a)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

package/libopenh264/libopenh264.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  8ffbe944e74043d0d3fb53d4a2a14c94de71f58dbea6a06d0dc92369542958ea  libopenh264-2.4.1.tar.gz
+sha256  a1b5c88bfb31c4d2251835e57a7df99f91181955cea6ec3ddd4ab82aa54ae9f1  libopenh264-2.5.1.tar.gz
 sha256  dd5c1c9668512530fa5a96e4c29ac4033d70a7eeb0eed7a42fddb6dd794ebdbb  LICENSE

package/libopenh264/libopenh264.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-LIBOPENH264_VERSION = 2.4.1
-LIBOPENH264_SITE = $(call github,cisco,openh264,v$(LIBOPENH264_VERSION))
+LIBOPENH264_VERSION = 2.5.1
+LIBOPENH264_SITE = $(call github,cisco,openh264,$(LIBOPENH264_VERSION))
 LIBOPENH264_LICENSE = BSD-2-Clause
 LIBOPENH264_LICENSE_FILES = LICENSE
 LIBOPENH264_CPE_ID_VENDOR = cisco