Move UseSystemZlib into SetupOSSpecificProps (dotnet#107666)

Author: hwoodiwiss

src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

@@ -24,12 +24,12 @@ The .NET Foundation licenses this file to you under the MIT license.
     <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
     <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
     <IlcDefaultStackSize Condition="'$(IlcDefaultStackSize)' == '' and '$(_linuxLibcFlavor)' == 'musl'">1572864</IlcDefaultStackSize>
-    <UseSystemZlib Condition="'$(UseSystemZlib)' == '' and !Exists('$(IlcSdkPath)libz.a')">true</UseSystemZlib>
   </PropertyGroup>
 
   <Target Name="SetupOSSpecificProps" DependsOnTargets="$(IlcDynamicBuildPropertyDependencies)">
 
     <PropertyGroup>
+      <UseSystemZlib Condition="'$(UseSystemZlib)' == '' and !Exists('$(IlcSdkPath)libz.a')">true</UseSystemZlib>
       <FullRuntimeName>libRuntime.WorkstationGC</FullRuntimeName>
       <FullRuntimeName Condition="'$(ServerGarbageCollection)' == 'true' or '$(IlcLinkServerGC)' == 'true'">libRuntime.ServerGC</FullRuntimeName>