[roll] Roll fuchsia [debugger] Handle asynchronous process termination better

..when traversing the job tree or detaching. Both of these operations
need to be resiliant against other parts of the system causing a process
to disappear out from under us.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1151953
Original-Revision: 996c9bc2a740d070ae5710be58dee29162d98b17
GitOrigin-RevId: a165cf58f3e1d9518a85542058c5736d4cb2df46
Change-Id: I7a1ba9127bfc46ce5fbbcfdd854a0bdce3927f0f

Author: Jacob Rutherford

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="a4be0752e0598c1111f4c3cc9682c60bbe3f6044"/>
+             revision="996c9bc2a740d070ae5710be58dee29162d98b17"/>
   </projects>
   <hooks>
     <hook name="install-environment"