Some more base fees.

test/libsolidity/analysis/FunctionCallGraph.cpp

@@ -1854,6 +1854,7 @@ BOOST_AUTO_TEST_CASE(builtins)
 				abi.encodePacked;
 				abi.encodeWithSelector;
 				abi.encodeWithSignature;
+				block.basefee;
 				block.chainid;
 				block.coinbase;
 				block.difficulty;

test/tools/yulInterpreter/EwasmBuiltinInterpreter.cpp

@@ -413,6 +413,11 @@ u256 EwasmBuiltinInterpreter::evalEthBuiltin(string const& _fun, vector<uint64_t
 		writeAddress(arg[3], h160(0xcccccc + arg[1]));
 		return 1;
 	}
+	else if (_fun == "getBlockBaseFee")
+	{
+		writeU128(arg[0], m_state.basefee);
+		return 0;
+	}
 	else if (_fun == "getBlockDifficulty")
 	{
 		writeU256(arg[0], m_state.difficulty);