[roll] Roll fuchsia [realm-builder] handle relative URLs at runtime

If a dynamic component is added to a realm with a relative URL,
component manager may construct an absolute URL on top of a
`realm-builder://` URL and then ask the realm builder server to resolve
it. We can detect this situation by looking for URL fragments (ex:
`#meta/foo.cm`) and then pulling up the requested manifest from the
test's package.

Original-Fixed: 85884
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/592964
Original-Revision: 96266e11e9f1729e529fcde31495f727a7cb709f
GitOrigin-RevId: 1746ded25b2538bcb64230aaff52f0505a8c722a
Change-Id: I0f668a3fa96abbc758355d90ba53e0729d90e395
diff --git a/stem b/stem
index 50f6418..d03e167 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="8225518d7bb708f6ef98facd328b2527292e7282"/>
+             revision="96266e11e9f1729e529fcde31495f727a7cb709f"/>
   </projects>
   <hooks>
     <hook name="install-environment"