[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/8686412079953911361
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Icc95a878f6281a5f7646e5ce3726eb2429446650
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1552400