[fix] fix error of computing CallingConvention in MethodBridge/Generator::BuildCalliMethods

Author: pirunxi

Editor/MethodBridge/Generator.cs

@@ -638,7 +638,7 @@ private List<CalliMethodInfo> BuildCalliMethods(List<CallNativeMethodSignatureIn
                 sharedMethod.Init();
                 sharedMethod = ToIsomorphicMethod(sharedMethod);
 
-                CallingConvention callingConv = (CallingConvention)((int)method.MethodSig.CallingConvention + 1);
+                CallingConvention callingConv = (CallingConvention)((int)(method.MethodSig.CallingConvention &  dnlib.DotNet.CallingConvention.Mask) + 1);
                 string signature = MakeCalliSignature(sharedMethod, callingConv);
 
                 if (!methodsBySig.TryGetValue(signature, out var arm))