Use links for ClearScript DLLs rather than a local copy

Always use ClearScript DLLs from the `packages` directory so `React.Sample.Mvc4` doesn't need its own copy.

Author: Daniel15

src/React.Sample.Mvc4/React.Sample.Mvc4.csproj

@@ -136,18 +136,22 @@
   <ItemGroup>
     <Compile Include="App_Start\FilterConfig.cs" />
     <Compile Include="App_Start\RouteConfig.cs" />
-    <None Include="ClearScript.V8\ClearScriptV8-32.dll">
+    <Content Include="..\packages\JavaScriptEngineSwitcher.V8.1.2.1\content\ClearScript.V8\ClearScriptV8-32.dll">
+      <Link>ClearScript.V8\ClearScriptV8-32.dll</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
-    <None Include="ClearScript.V8\ClearScriptV8-64.dll">
+    </Content>
+    <Content Include="..\packages\JavaScriptEngineSwitcher.V8.1.2.1\content\ClearScript.V8\ClearScriptV8-64.dll">
+      <Link>ClearScript.V8\ClearScriptV8-64.dll</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
-    <None Include="ClearScript.V8\v8-ia32.dll">
+    </Content>
+    <Content Include="..\packages\JavaScriptEngineSwitcher.V8.1.2.1\content\ClearScript.V8\v8-ia32.dll">
+      <Link>ClearScript.V8\v8-ia32.dll</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
-    <None Include="ClearScript.V8\v8-x64.dll">
+    </Content>
+    <Content Include="..\packages\JavaScriptEngineSwitcher.V8.1.2.1\content\ClearScript.V8\v8-x64.dll">
+      <Link>ClearScript.V8\v8-x64.dll</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
+    </Content>
     <Content Include="Content\Sample.css" />
     <Content Include="Global.asax" />
     <Content Include="Web.config" />