Use simpler isFamily check for netware

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270465 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/myrmidon/framework/exec/impl/DefaultExecManager.java

@@ -154,7 +154,7 @@ public class DefaultExecManager
                 launcher = new ScriptCommandLauncher( script );
             }
         }
-        else if( ( new Os( "netware" ) ).eval() )
+        else if( Os.isFamily( "netware" ) )
         {
             // NetWare.  Need to determine which JDK we're running in
             final String perlScript = resolveCommand( antDir, "bin/antRun.pl" );