[jnimarshalmethod-gen] support methods with 14+ arguments

[radekdoulik]

Commits 70fc4c0 and 857b9a9 introduced support for handling methods with 14 and more
arguments. jnimarshalmethod-gen still needed update for handling these correctly and it is
implemented here.

The IL improvements code was updated to know how to handle new custom delegates code from
System.Linq.Expression.

The _ALL_THE_ARGUMENTS define was removed as it is no longer needed.

The test was updated to use the new staticFuncThisMethodTakesLotsOfParameters method.

Example generated code:

[JniAddNativeMethodRegistration]
public static void __RegisterNativeMembers (JniNativeMethodRegistrationArguments args)
{
	args.AddRegistrations (new JniNativeMethodRegistration[11] {
		new JniNativeMethodRegistration ("funcIJavaObject", "()Ljava/lang/Object;", new Func<IntPtr, IntPtr, IntPtr> (FuncIJavaObject)),
		new JniNativeMethodRegistration ("funcInt64", "()J", new Func<IntPtr, IntPtr, long> (FuncInt64)),
		new JniNativeMethodRegistration ("action", "()V", new Action<IntPtr, IntPtr> (InstanceAction)),
		new JniNativeMethodRegistration ("actionIJavaObject", "(Ljava/lang/Object;)V", new Action<IntPtr, IntPtr, IntPtr> (InstanceActionIJavaObject)),
		new JniNativeMethodRegistration ("staticAction", "()V", new Action<IntPtr, IntPtr> (StaticAction)),
		new JniNativeMethodRegistration ("staticActionFloat", "(F)V", new Action<IntPtr, IntPtr, float> (StaticActionFloat)),
		new JniNativeMethodRegistration ("staticActionIJavaObject", "(Ljava/lang/Object;)V", new Action<IntPtr, IntPtr, IntPtr> (StaticActionIJavaObject)),
		new JniNativeMethodRegistration ("staticActionInt", "(I)V", new Action<IntPtr, IntPtr, int> (StaticActionInt)),
		new JniNativeMethodRegistration ("staticActionInt32String", "(ILjava/lang/String;)V", new Action<IntPtr, IntPtr, int, IntPtr> (StaticActionInt32String)),
		new JniNativeMethodRegistration ("staticFuncMyLegacyColorMyColor_MyColor", "(II)I", new Func<IntPtr, IntPtr, int, int, int> (StaticFuncMyLegacyColorMyColor_MyColor)),
		new JniNativeMethodRegistration ("staticFuncThisMethodTakesLotsOfParameters", "(ZBCSIJFDLjava/lang/Object;Ljava/lang/String;Ljava/util/ArrayList;Ljava/lang/String;Ljava/lang/Object;DFJ)Z", new _JniMarshal_PPZBCSIJFDLLLLLDFJ_Z (StaticFuncThisMethodTakesLotsOfParameters))
	});
}

[jonpryor]

Let's see how it works in xamarin-android! dotnet/android#4860