Added "Windows 7" detection for os.name system property.

classpath/gnu/classpath/VMSystemProperties.java

@@ -241,12 +241,17 @@ public class VMSystemProperties
                         }
                         break;
                     case 6:
+                        // since there appears to be no managed way to differentiate between Client/Server, we report client names
                         switch(minor)
                         {
                             case 0:
                                 osver = "6.0";
                                 osname = "Windows Vista";
                                 break;
+                            case 1:
+                                osver = "6.1";
+                                osname = "Windows 7";
+                                break;
                         }
                         break;
                 }