CMake and Code Signing in XCode 8 for iOS projects : <p>CMake was able to configure automatic code signing for XCode &lt;=7 and iOS projects with a target property setting like </p>

<pre><code>set_target_properties(app PROPERTIES XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "PROPER IDENTIFIER")
</code></pre>

<p>XCode 8 changed the signing process. It now is required that the option 
"Automatically manage signing" in the project settings "General tab -> Signing" is checked. If I check this options manually for a cmake generated project, signing works well. But I did not find a way to enable this option from cmake project by default. Can this be done for cmake (>=3.7.0)?</p>
