Snippets for matrix-conduit 0.10.12 from Alpine ppc64le

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-ppc64le/community/conduit/conduit-0.10.12-r1.log.

• warning: hiding a lifetime that's elided elsewhere is confusing
     --> src/service/pdu.rs:157:20
      |
  157 |     pub fn room_id(&self) -> Cow<RoomId> {
      |                    ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
      |                    |
      |                    the lifetime is elided here
      |
      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default