Merge pull request dotnet#1588 from StephenBonikowsky/UpdateToCoreFx2…

…4530-04

Updating CoreFx dependency to version preview1-24530-04

Merge pull request dotnet#1288 from zhenlan/port-test-fix

Add conditional fact for the tests need root cert

Merge pull request dotnet#1010 from ericstj/port-pcl-inbox

[RC2] Add placeholders for PCL profiles

Merge pull request dotnet#471 from roncain/port-rc1-fixes

Port rc1 fixes