webp: bump to version 0.5.2

Signed-off-by: Gilles Talis <gilles.talis@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/webp/webp.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256	efbe0d58fda936f2ed99d0b837ed7087d064d6838931f282c4618d2a3f7390c4	libwebp-0.4.3.tar.gz
+sha256	b75310c810b3eda222c77f6d6c26b061240e3d9060095de44b2c1bae291ecdef	libwebp-0.5.2.tar.gz

package/webp/webp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-WEBP_VERSION = 0.4.3
+WEBP_VERSION = 0.5.2
 WEBP_SOURCE = libwebp-$(WEBP_VERSION).tar.gz
 WEBP_SITE = http://downloads.webmproject.org/releases/webp
 WEBP_LICENSE = BSD-3c