libvpx: update hash

Hash was wrong.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/libvpx/Makefile

@@ -14,7 +14,7 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://chromium.googlesource.com/webm/libvpx
-PKG_MIRROR_HASH:=51e871a928fe98f14fd08285cb9b64c0d540b36b630ee7d47bc464e909366db7
+PKG_MIRROR_HASH:=0449675ee4f9984b32d7e415fd06fcc210135748eae1a2128f8a91832155dbcb
 PKG_SOURCE_VERSION:=v$(PKG_VERSION)
 
 PKG_MAINTAINER:=Luiz Angelo Daros de Luca <luizluca@gmail.com>