Build: Fixing clean, restore and pack state for the skipped windows host

.github/workflows/build.yml

@@ -37,6 +37,7 @@ jobs:
           else
             # sudo add-apt-repository -y "deb http://azure.archive.ubuntu.com/ubuntu groovy main multiverse restricted universe"
             # sudo apt-get update -y
+            sudo apt-get update 
             sudo apt-get install -y libavutil-dev libavcodec-dev libavformat-dev
           fi
       - name: Enabling windows compilations tools

Kyoo.WindowsHost/Kyoo.WindowsHost.linux.target

@@ -1,12 +1,20 @@
 <Project>
 	<!-- Project file used instead of the default csproj when the host system is not windows. This only skip the build. -->
 	
+	<Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
+	
 	<PropertyGroup>
 		<TargetFramework>net5.0</TargetFramework>
 		<NoWarn>NU1503</NoWarn>
 	</PropertyGroup>
 
+	<Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
+	
 	<Target Name="Build">
 		<Message Importance="high" Text="Detected current operating system is not windows, skipping WindowsHost build." />
 	</Target>
+
+	<Target Name="Clean" />
+	<Target Name="Pack" />
+	<Target Name="Restore" />
 </Project>