A previous refactor made queries no longer a graph resource.  This in
turn meant that the query nodes no longer had an ID, which tripped up
the ID assignment when dumping the graph.

This affected fences as well.

Bug: angleproject:2853
Change-Id: I359f8145dca068edaa5fcd5bcb0a231ee050ab76
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1520990
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>