Fixes MonoDoc.app not having all required files in app bundle.
The build of MonoDoc was failing with Xamarin.Mac 5.6 since that
version of Xamarin.Mac requires 10.9 to be used in the info.plist
for MonoDoc.
MMP: error MM0073: Xamarin.Mac 5.6.0 does not support a deployment
target of 10.7 for macOS (the minimum is 10.9). Please select a newer
deployment target in your project's Info.plist.
Fixes VSTS #766219 MonoDoc bundle does not include binary files