hg: jdk8u/jdk8u-dev/jdk: 8169961: Memory leak after debugging session

[david.buck at oracle.com]

Changeset: e08e3d587892
Author:    shshahma
Date:      2017-08-29 12:13 -0400
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/e08e3d587892

8169961: Memory leak after debugging session
Summary: TargetVM gets an EventController which is a daemon thread, but don't see the thread having a way of stopping so added code to exit as soon as TargetVM thread stops listening.
Reviewed-by: sspitsyn

! src/share/classes/com/sun/tools/jdi/TargetVM.java