Fix missing AArch64 entry in CLI CppAbi

Author: konistehrad

src/CppParser/Bindings/CLI/Decl.h

@@ -255,9 +255,10 @@ namespace CppSharp
                 Itanium = 0,
                 Microsoft = 1,
                 ARM = 2,
-                iOS = 3,
-                AppleARM64 = 4,
-                WebAssembly = 5
+		AArch64 = 3,
+                iOS = 4,
+                AppleARM64 = 5,
+                WebAssembly = 6
             };
 
             public enum class RecordArgABI