Set libdoh_frontend_ffi to link libstd statically

With a new build change, libdoh_frontend_ffi links libstd
dynamically, but libquiche links it in statically. This can lead
to a compilation error. Instead explicitly request libstd be linked as
an rlib.

Bug: 383552450
Test: m rust
Change-Id: I9dd5aaef9a1a344afc0f09f05ee33641d738a4c1