[dotnet] Adjust ILC's build dependencies to cope with the fact that I…

…LC doesn't support executing after ILLink.

Currently, NativeAOT is implemented as a replacement (of sorts) for ILLink. However,
we need to execute both, and in order to do that, we force our own logic to execute
to determine what ILC does.

This might be improved in the future. Ref: dotnet/runtime#87187.

dotnet/targets/Xamarin.Shared.Sdk.targets

@@ -443,6 +443,10 @@
 		</_ComputeLinkerArgumentsDependsOn>
 	</PropertyGroup>
 
+	<PropertyGroup Condition="'$(PublishAot)' == 'true'">
+		<IlcCompileDependsOn>Compile;_ComputeLinkerArguments;_ComputeManagedAssemblyToLink;SetupOSSpecificProps;PrepareForILLink;_XamarinComputeIlcCompileInputs</IlcCompileDependsOn>
+	</PropertyGroup>
+
 	<Target Name="_ComputeLinkerFeatures">
 		<PropertyGroup Condition="'$(PublishAot)' == 'true'">
 			<!-- The one and only registrar is 'managed-static' when using NativeAOT -->
@@ -1166,6 +1170,13 @@
 		</ItemGroup>
 	</Target>
 
+	<Target Name="_XamarinComputeIlcCompileInputs">
+		<PropertyGroup>
+			<!-- Ask ILC to produce a static library -->
+			<NativeLib>static</NativeLib>
+		</PropertyGroup>
+	</Target>
+
 	<PropertyGroup>
 		<_GenerateBindingsDependsOn>
 			_ComputeBindingVariables;