Incremental builds in VS does not copy Views dll from referencing class library project

[pranavkm]

Steps:

1. Create a solution containing a WebApp that references a Razor Class Library project.
2. Build the solution
3. Verify that the ClassLibrary Views dll and pdb are copied to the WebApp's output directory
4. Clean the WebApp
5. Build it.

Expected:
Views dll exists in the build output dir of WebApp

Actual:
No view dll found in the build output dir