bz-26453 use INFO log level to print the result log message from exec task, when the process returns non-zero exit code

Author: jaikiran

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

@@ -674,7 +674,7 @@ protected final void runExecute(Execute exe) throws IOException {
                     throw new BuildException(getTaskType() + " returned: "
                         + returnCode, getLocation());
                 }
-                log("Result: " + returnCode, Project.MSG_ERR);
+                log("Result: " + returnCode, Project.MSG_INFO);
             }
         } else {
             exe.spawn();