[fuchsia] Migrate prebuilt & C++ library deps to use SDK targets.

Migrate dependencies on SDK-provided prebuilt & C++ libraries to refer
directly to the SDK-provided GN targets, rather than the old Chromium-
generated rules.

TBR=jochen

Bug: 1050703
Change-Id: Ifc200463791e71763d04de3e3cdd394404bdfedb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2059008
Reviewed-by: Wez <[email protected]>
Reviewed-by: Sergey Ulanov <[email protected]>
Commit-Queue: Wez <[email protected]>
Cr-Commit-Position: refs/heads/master@{#742153}
23 files changed