Building Roslyn.sln does not deploy servicehub binaries properly.,

[CyrusNajmabadi]

Using:

Repro steps.

1. Delete RoslynDev hive
2. Build Roslyn.sln.
3. Make change in some code that should run in servicehub
4. Build Roslyn.sln again

First time succeeds with:

WARNING: Potential build performance issue in 'IntegrationTestBuildProject.csproj'. The project does not appear up-to-date after a successful build: Output 'D:\github\roslyn\artifacts\bin\IntegrationTestBuildProject\Debug\net45\IntegrationTestBuildProject.dll' does not exist, not up-to-date. See https://aka.ms/incremental-build-failure.
========== Rebuild All: 207 succeeded, 0 failed, 0 skipped ==========
========== Rebuild completed at 2:10 PM and took 03:20.100 minutes ==========

Second time does not update hte hive. Attempting to run the code will result in old code loading. The only recourse is to delete the hive and do a full rebuild.