Add space in shared lib entrypoint option (dotnet#106073)

Per @alexrp's suggestion ziglang/zig#20384 (comment).

I've tested it with bfd and lld. It should work with existing zld as well (which is currently handling `-Wl,-e,0x0`).

Fixes dotnet#106029

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

@@ -208,7 +208,7 @@ The .NET Foundation licenses this file to you under the MIT license.
       <LinkerArg Include="-Wl,-install_name,&quot;$(SharedLibraryInstallName)&quot;" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(NativeLib)' == 'Shared'" />
       <LinkerArg Include="-Wl,--build-id=sha1" Condition="'$(_IsApplePlatform)' != 'true'" />
       <LinkerArg Include="-Wl,--as-needed" Condition="'$(_IsApplePlatform)' != 'true'" />
-      <LinkerArg Include="-Wl,-e0x0" Condition="'$(NativeLib)' == 'Shared' and '$(_IsApplePlatform)' != 'true'" />
+      <LinkerArg Include="-Wl,-e,0x0" Condition="'$(NativeLib)' == 'Shared' and '$(_IsApplePlatform)' != 'true'" />
       <LinkerArg Include="-pthread" Condition="'$(_IsApplePlatform)' != 'true'" />
       <LinkerArg Include="@(NativeSystemLibrary->'-l%(Identity)')" />
       <LinkerArg Include="-L/usr/lib/swift" Condition="'$(_IsApplePlatform)' == 'true'" />