runtime-api: pass call arguments in registers instead of spilling to stack (#174)

Companion to paritytech/polkadot-sdk#7319

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

crates/runner/src/lib.rs

@@ -85,6 +85,7 @@ impl ExtBuilder {
             .unwrap();
         pallet_balances::GenesisConfig::<Runtime> {
             balances: self.balance_genesis_config,
+            dev_accounts: None,
         }
         .assimilate_storage(&mut t)
         .unwrap();