[submodules] Update submodule pins

This change synchronizes submodule revisions with Jiri manifest state.
These revisions have no bearing on Fuchsia builds or local checkouts
and are only used by Code Search.

If you wish to update a repository's revision, update the corresponding
Jiri manifest and the change will automatically be synchronized to
submodules.

Roller-URL: https://cr-buildbucket.appspot.com/build/8687487944302657089
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Idb4f4feb7ce1c2eec60ac87515e4672e1cc3d6e2
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1536816