Disable MonthTest on Windows

Change-Id: If19135fc227b1f3f945897c9b8a3ba136efe46e4
diff --git a/src/test/java/com/android/tools/r8/desugar/desugaredlibrary/MonthTest.java b/src/test/java/com/android/tools/r8/desugar/desugaredlibrary/MonthTest.java
index 1c96f50..7f5cfd9 100644
--- a/src/test/java/com/android/tools/r8/desugar/desugaredlibrary/MonthTest.java
+++ b/src/test/java/com/android/tools/r8/desugar/desugaredlibrary/MonthTest.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.TestParameters;
 import com.android.tools.r8.TestRuntime.CfVm;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ToolHelper.DexVm.Version;
 import com.android.tools.r8.desugar.desugaredlibrary.test.CompilationSpecification;
 import com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification;
@@ -18,6 +19,7 @@
 import java.time.format.TextStyle;
 import java.util.List;
 import java.util.Locale;
+import org.junit.Assume;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -122,6 +124,7 @@
   @Test
   public void testMonth() throws Exception {
     if (parameters.isCfRuntime()) {
+      Assume.assumeFalse("Missing data for Locale RU on Windows", ToolHelper.isWindows());
       testForJvm(parameters)
           .addInnerClasses(MonthTest.class)
           .run(parameters.getRuntime(), Main.class)