package/webp: security bump to version 1.3.2

- security fixes for lossless encoder (#603, chromium: #1420107,
  #1455619, CVE-2023-1999)
- security fix for lossless decoder (chromium: #1479274,
  CVE-2023-4863)

https://github.com/webmproject/libwebp/blob/v1.3.2/NEWS

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit c88c1d3319dd24fa833455a2e7d96bc4585bab7f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/webp/webp.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  7bf5a8a28cc69bcfa8cb214f2c3095703c6b73ac5fba4d5480c205331d9494df  libwebp-1.2.4.tar.gz
+sha256  2a499607df669e40258e53d0ade8035ba4ec0175244869d1025d460562aa09b4  libwebp-1.3.2.tar.gz
 sha256  5aec868f669e384a22372a4e8a1a6cd7d44c64cd451f960ca69cc170d1e13acf  COPYING

package/webp/webp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-WEBP_VERSION = 1.2.4
+WEBP_VERSION = 1.3.2
 WEBP_SOURCE = libwebp-$(WEBP_VERSION).tar.gz
 WEBP_SITE = http://downloads.webmproject.org/releases/webp
 WEBP_LICENSE = BSD-3-Clause