fixup! ABI coder v1 deprecation warning

Author: matheusaaguiar

libsolidity/analysis/SyntaxChecker.cpp

@@ -154,7 +154,8 @@ bool SyntaxChecker::visit(PragmaDirective const& _pragma)
 			m_errorReporter.warning(
 				9511_error,
 				_pragma.location(),
-				"ABI coder v1 is deprecated and scheduled for removal in the next breaking version (0.9)."
+				"ABI coder v1 is deprecated and scheduled for removal in the next breaking version (0.9). "
+				"Use ABI coder v2 instead."
 			);
 	}
 	else if (_pragma.literals()[0] == "solidity")