Add script to build with cmake

Signed-off-by: Samuli Seppänen <[email protected]>

build-msvc.ps1

@@ -0,0 +1,19 @@
+# Build openvpn-gui with MSVC
+
+$CWD = Get-Location
+
+$CMAKE="C:\Program Files\CMake\bin\cmake.exe"
+$CMAKE_TOOLCHAIN_FILE="C:\users\vagrant\buildbot\windows-server-2019-static-msbuild\vcpkg\scripts\buildsystems\vcpkg.cmake"
+
+# Architecture names taken from here:
+#
+# https://docs.microsoft.com/en-us/cpp/build/cmake-presets-vs?view=msvc-160
+"x64", "arm64", "Win32" | ForEach  {
+	$platform = $_
+    Write-Host "Building openvpn-gui ${platform}"
+    mkdir build_$platform
+    cd build_$platform
+    & "$CMAKE" -A $platform -DCMAKE_TOOLCHAIN_FILE="$CMAKE_TOOLCHAIN_FILE" ..
+    & "$CMAKE" --build . --config Release
+    cd $CWD
+}