Close process streams in waitFor(Process).

PR: 28565


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276416 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -536,6 +536,13 @@ public class Execute {
             setExitValue(process.exitValue());
         } catch (InterruptedException e) {
             process.destroy();
+        } finally {
+            try {
+                process.getInputStream().close();
+                process.getOutputStream().close();
+                process.getErrorStream().close();
+            } catch (IOException eyeOhEx) {
+            }
         }
     }