libvpx.recipe: Set target Windows SDK version

Fixes gstreamer/cerbero#90

recipes/libvpx.recipe

@@ -34,7 +34,8 @@ class Recipe(recipe.Recipe):
                # Taken from AOSP: https://android.googlesource.com/platform/external/libvpx/+/android-o-mr1-iot-release-1.0.3/
                'libvpx/0005-Add-visibility-protected-attribute-for-global-variab.patch',
                'libvpx/0006-Fix-pkg-config-file-library-list.patch',
-               'libvpx/0007-Always-generate-a-pkg-config-file-and-don-t-require-.patch'
+               'libvpx/0007-Always-generate-a-pkg-config-file-and-don-t-require-.patch',
+               'libvpx/0001-gen_msvs_vcxproj.sh-Select-current-Windows-SDK-if-av.patch',
                ]
 
     files_libs = ['libvpx']

recipes/libvpx/0001-gen_msvs_vcxproj.sh-Select-current-Windows-SDK-if-av.patch

+From 882bf3cdd9d75e49f94933a103986d00c5c0b89b Mon Sep 17 00:00:00 2001
+From: Nirbheek Chauhan <nirbheek@centricular.com>
+Date: Tue, 26 Feb 2019 19:16:19 +0530
+Subject: [PATCH] gen_msvs_vcxproj.sh: Select current Windows SDK if available
+
+If WindowsTargetPlatformVersion is omitted, Visual Studio defaults to
+the Windows 8.1 SDK. This is obviously wrong since we always use the
+latest Windows 10 SDK. Force the project file to do so.
+---
+ build/make/gen_msvs_vcxproj.sh | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/build/make/gen_msvs_vcxproj.sh b/build/make/gen_msvs_vcxproj.sh
+index 171d0b9..788a462 100644
+--- a/build/make/gen_msvs_vcxproj.sh
++++ b/build/make/gen_msvs_vcxproj.sh
+@@ -295,6 +295,9 @@ generate_vcxproj() {
+         tag_content ProjectGuid "{${guid}}"
+         tag_content RootNamespace ${name}
+         tag_content Keyword ManagedCProj
++        if [ -n "${WINDOWSSDKVERSION}" ]; then
++            tag_content WindowsTargetPlatformVersion "${WINDOWSSDKVERSION%\\}"
++        fi
+         if [ $vs_ver -ge 12 ] && [ "${platforms[0]}" = "ARM" ]; then
+             tag_content AppContainerApplication true
+             # The application type can be one of "Windows Store",
+-- 
+2.20.1.windows.1
+