test: Replace the C++ MOCK_METHOD<n> macros with the new MOCK_METHOD

Change-Id: I5099c727e9e918f19fa61acc91ef75250ebc6fa6
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/bmc/firmware-handler/test/crc_mock.hpp b/bmc/firmware-handler/test/crc_mock.hpp
index 293ec24..c33188d 100644
--- a/bmc/firmware-handler/test/crc_mock.hpp
+++ b/bmc/firmware-handler/test/crc_mock.hpp
@@ -18,6 +18,6 @@
 {
   public:
     virtual ~CrcMock() = default;
-    MOCK_CONST_METHOD1(generateCrc,
-                       std::uint16_t(const std::vector<std::uint8_t>&));
+    MOCK_METHOD(std::uint16_t, generateCrc, (const std::vector<std::uint8_t>&),
+                (const, override));
 };