Fix Windows sanity test.

backend.native/tests/build.gradle

@@ -3007,7 +3007,7 @@ task interop_callbacksAndVarargs(type: RunInteropKonanTest) {
 }
 
 task interop_echo_server(type: RunInteropKonanTest) {
-    disabled = (project.testTarget == 'wasm32') // No interop for wasm yet.
+    disabled = isWasmTarget(project) || isWindowsTarget(project)
     run = false
     source = "interop/basics/echo_server.kt"
     interop = 'sockets'

build.gradle

@@ -163,10 +163,22 @@ class PlatformInfo {
     }
 
     boolean isAppleTarget(Project project) {
+        def target = getTarget(project)
+        return target.family == Family.IOS || target.family == Family.OSX
+    }
+
+    boolean isWindowsTarget(Project project) {
+        return getTarget(project).family == Family.MINGW
+    }
+
+    boolean isWasmTarget(Project project) {
+        return getTarget(project).family == Family.WASM
+    }
+
+    KonanTarget getTarget(Project project) {
         def platformManager = project.rootProject.platformManager
         def targetName = project.project.testTarget ?: 'host'
-        def target = platformManager.targetManager(targetName).target
-        return target.family == Family.IOS || target.family == Family.OSX
+        return platformManager.targetManager(targetName).target
     }
 
     Throwable unsupportedPlatformException() {