Disable VP9 encoder

source/config/win/x64/vpx_config.c

Index: source/config/win/x64/vpx_config.c
===================================================================
--- source/config/win/x64/vpx_config.c	(revision 247649)
+++ source/config/win/x64/vpx_config.c	(working copy)
@@ -5,5 +5,5 @@
 /* tree. An additional intellectual property rights grant can be found */
 /* in the file PATENTS.  All contributing project authors may */
 /* be found in the AUTHORS file in the root of the source tree. */
-static const char* const cfg = "--target=x86_64-win64-vs9 --enable-realtime-only --enable-external-build --enable-postproc --disable-install-srcs --enable-multi-res-encoding --enable-temporal-denoising --disable-unit-tests --disable-install-docs --disable-examples --disable-avx2";
+static const char* const cfg = "--target=x86_64-win64-vs9 --enable-realtime-only --enable-external-build --enable-postproc --disable-install-srcs --enable-multi-res-encoding --enable-temporal-denoising --disable-unit-tests --disable-install-docs --disable-examples --disable-avx2 --disable-vp9-encoder";
 const char *vpx_codec_build_config(void) {return cfg;}