Steps to reproduce:

1. Open Build Profile window (File > Build Profiles)

2. Create a build profile and add a custom player settings (Press Customize player settings)

3. Change Lightmap Streaming in Other Settings > Rendering

Actual results: 

When changing the Lightmap Streaming for a build profile, it's changing globally (for all profiles and for Project Settings > Player Settings). Same for the Streaming Priority that shows up when the Lightmap Streaming is enabled

Expected results: 

The Lightmap Streaming and Streaming Priority should be changed for build profile only