x264: update to commit from 2020-10-26

Snapshots were discontinued according to
https://downloads.videolan.org/x264/snapshots/x264-snapshot-20191218-README.txt
and users should use source code.

While at it, fix SPDX License Identifier to correct one.

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

libs/libx264/Makefile

@@ -8,15 +8,16 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=x264
-PKG_VERSION:=snapshot-20190324-2245
-PKG_RELEASE:=2
+PKG_VERSION:=2020-10-26
+PKG_RELEASE:=1
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
-PKG_SOURCE_URL:=https://download.videolan.org/x264/snapshots/
-PKG_MAINTAINER:=Adrian Panella <ianchi74@outlook.com>
-PKG_HASH:=68010057edaadffc7593933d13084e8d32e041c42b17c089513d88c917f2ad54
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://code.videolan.org/videolan/x264.git
+PKG_SOURCE_VERSION:=4121277b40a667665d4eea1726aefdc55d12d110
+PKG_MIRROR_HASH:=4b4955e8f92d0c4afecbced2cc6414a123085f7472d198b3eeddaa9490b84f60
 
-PKG_LICENSE:=GPL-2.0
+PKG_MAINTAINER:=Adrian Panella <ianchi74@outlook.com>
+PKG_LICENSE:=GPL-2.0-or-later
 PKG_LICENSE_FILES:=COPYING
 
 PKG_INSTALL:=1