Make RoutePartsEqual public.

Need this inside MVC for attribute routing
Tooling does what it does. 

Looks like one of @harshgMSFT changes added this line to the project file - but the file was not checked in. Looks like it was a rename that VS didn't figure out.

https://github.com/aspnet/Routing/commit/fbffcb7b401951d3cd7567e62765490d66e92a11