8020191: System.getProperty("os.name") returns "Windows NT (unknown)" on Windows 8.1

Reviewed-by: alanb, khazra, chegar

src/windows/native/java/lang/java_props_md.c

@@ -443,6 +443,7 @@ GetJavaProperties(JNIEnv* env)
                     case  0: sprops.os_name = "Windows Vista";        break;
                     case  1: sprops.os_name = "Windows 7";            break;
                     case  2: sprops.os_name = "Windows 8";            break;
+                    case  3: sprops.os_name = "Windows 8.1";          break;
                     default: sprops.os_name = "Windows NT (unknown)";
                     }
                 } else {
@@ -450,6 +451,7 @@ GetJavaProperties(JNIEnv* env)
                     case  0: sprops.os_name = "Windows Server 2008";    break;
                     case  1: sprops.os_name = "Windows Server 2008 R2"; break;
                     case  2: sprops.os_name = "Windows Server 2012";    break;
+                    case  3: sprops.os_name = "Windows Server 2012 R2"; break;
                     default: sprops.os_name = "Windows NT (unknown)";
                     }
                 }

src/windows/resource/java.manifest

@@ -44,8 +44,14 @@
   <!-- Indicate this JDK version is Windows 7 compatible -->
    <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
       <application>
-        <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+        <!-- Windows Vista -->
         <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
+        <!-- Windows 7 -->
+        <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+        <!-- Windows 8 -->
+        <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+        <!-- Windows 8.1 -->
+        <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
       </application>
     </compatibility>