Ignore ControlFlowGuard outside Windows (#101268)

Don't deoptimize dehydration for this.

Author: MichalStrehovsky

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

@@ -229,7 +229,7 @@ The .NET Foundation licenses this file to you under the MIT license.
       <IlcArg Condition="$(_targetOS) != ''" Include="--targetos:$(_targetOS)" />
       <IlcArg Condition="$(_targetArchitectureWithAbi) != ''" Include="--targetarch:$(_targetArchitectureWithAbi)" />
       <IlcArg Condition="$(IlcMultiModule) == 'true'" Include="--multifile" />
-      <IlcArg Condition="$(IlcMultiModule) != 'true' and '$(IlcDehydrate)' != 'false' and '$(ControlFlowGuard)' != 'Guard'" Include="--dehydrate" />
+      <IlcArg Condition="$(IlcMultiModule) != 'true' and '$(IlcDehydrate)' != 'false' and ('$(ControlFlowGuard)' != 'Guard' or '$(_targetOS)' != 'win')" Include="--dehydrate" />
       <IlcArg Condition="$(Optimize) == 'true'" Include="-O" />
       <IlcArg Condition="$(NativeDebugSymbols) == 'true'" Include="-g" />
       <IlcArg Condition="$(IlcDwarfVersion) == '5'" Include="--gdwarf-5" />