win32 sample: gradle build

samples/settings.gradle

@@ -13,4 +13,5 @@ include ':tensorflow'
 // include ':androidNativeActivity'
 include ':objc'
 include ':uikit'
+include ':win32'
 includeBuild '../'

samples/win32/README.md

@@ -0,0 +1,5 @@
+# WIN32 Hello World
+
+To build use `..\gradlew build` or `build.bat`.
+
+To run use `..\gradlew run` or `MessageBox.exe`.

samples/win32/build.gradle

@@ -0,0 +1,9 @@
+apply plugin: 'konan'
+
+konan.targets = ['mingw']
+
+konanArtifacts {
+    program('MessageBox') {
+        linkerOpts "-Wl,--subsystem,windows"
+    }
+}