reverted the logic in two tasks by accident.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272553 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Get.java

@@ -304,7 +304,7 @@ public class Get extends Task {
      * @param v "true" to enable file time fetching
      */
     public void setUseTimestamp(boolean v) {
-        if (JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
+        if (!JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
             useTimestamp = v;
         }
     }

src/main/org/apache/tools/ant/taskdefs/Touch.java

@@ -187,7 +187,7 @@ public class Touch extends Task {
         }
 
         if (millis >= 0 && 
-            !JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
+            JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
             log("modification time of files cannot be set in JDK 1.1",
                 Project.MSG_WARN);
             return;