use echo output only on Windows

Author: graemerocher

grails-bootstrap/src/main/groovy/grails/build/logging/GrailsConsole.java

@@ -205,7 +205,9 @@ protected ConsoleReader createConsoleReader() throws IOException {
      */
     protected Terminal createTerminal() {
         terminal = TerminalFactory.create();
-        terminal.setEchoEnabled(true);
+        if(isWindows()) {
+            terminal.setEchoEnabled(true);
+        }
         return terminal;
     }