MDP error with some device libs

[networkfusion]

#Details about Problem

When building some device libraries with the new MDP, it fails. due to a missing reference table for System.DateTime
Found so far:
Windows.Devices.SerialCommunication
Windows.Devices.GPIO
nanoFramework.Devices.Can

VS version
2019

VS extension version
2019.1.8.10

Detailed repro steps so we can see the same problem

1. Clone the repo

2. Open with Visual Studio

3. Change to release mode

4. Rebuild solution

Screenshot