switch to pallet_revive runtime (#40)

Signed-off-by: xermicus <cyrill@parity.io>

crates/runtime-api/src/lib.rs

@@ -0,0 +1,11 @@
+//! This crate vendors the [PolkaVM][0] C API and provides a LLVM module for interacting
+//! with the `pallet-revive` runtime API.
+//! At present, the contracts pallet requires blobs to export `call` and `deploy`,
+//! and offers a bunch of [runtime API methods][1]. The provided [module] implements
+//! those exports and imports.
+//! [0]: [https://crates.io/crates/polkavm]
+//! [1]: [https://docs.rs/pallet-contracts/26.0.0/pallet_contracts/api_doc/index.html]
+
+pub mod calling_convention;
+pub mod polkavm_exports;
+pub mod polkavm_imports;