Handle the WSL optional component not being present in Spring Creators Update
Created by: benhillis
This change will print the optional component install instructions for users running Spring Creators Update. In previous versions of Windows, wslapi.dll was not present unless the Windows Subsystem for Linux optional component was enabled.
Before this change a cryptic error code was printed, but after the change the failure looks like this:
Installing, this may take a few minutes... WslRegisterDistribution failed with error: 0x8007019e The Windows Subsystem for Linux optional component is not enabled. Please enable it and try again. See https://aka.ms/wslinstall for details. Press any key to continue...