Update declaration for Serial.IO.Ports (#2433)

Author: josesimoes

src/System.IO.Ports/sys_io_ser_native.cpp

@@ -48,6 +48,7 @@ static const CLR_RT_MethodHandler method_lookup[] =
     NULL,
     NULL,
     NULL,
+    NULL,
     Library_sys_io_ser_native_System_IO_Ports_SerialPort::get_BytesToRead___I4,
     Library_sys_io_ser_native_System_IO_Ports_SerialPort::get_InvertSignalLevels___BOOLEAN,
     Library_sys_io_ser_native_System_IO_Ports_SerialPort::set_InvertSignalLevels___VOID__BOOLEAN,
@@ -104,7 +105,7 @@ const CLR_RT_NativeAssemblyData g_CLR_AssemblyNative_System_IO_Ports =
     "System.IO.Ports",
     0xB798CE30,
     method_lookup,
-    { 100, 1, 6, 0 }
+    { 100, 1, 6, 1 }
 };
 
 // clang-format on

src/System.IO.Ports/sys_io_ser_native.h

@@ -127,7 +127,7 @@ struct Library_sys_io_ser_native_System_IO_Ports_SerialDeviceEventListener
 
 struct Library_sys_io_ser_native_System_IO_Ports_SerialStream
 {
-    static const int FIELD___serial = 1;
+    static const int FIELD___serial = 2;
 
     //--//
 };