[release/3.0.100-preview9] Update dependencies from dotnet/core-setup

[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/dotnet/core-setup

• Build: 20190821.20
• Date Produced: 8/22/2019 2:44 AM
• Commit: 33c773a5c7602e599053fdbb3a12b7ecfda27e2e
• Branch: refs/heads/release/3.0-preview9
• Updates:
  • Microsoft.NETCore.App -> 3.0.0-preview9-19421-20
  • Microsoft.NET.HostModel -> 3.0.0-preview9-19421-20
  • Microsoft.Extensions.DependencyModel -> 3.0.0-preview9-19421-20
  • Microsoft.DotNet.PlatformAbstractions -> 3.0.0-preview9-19421-20
  • Microsoft.NETCore.DotNetHostResolver -> 3.0.0-preview9-19421-20

[dotnet-maestro]

Auto-Merge Status

This pull request has not been merged because Maestro++ is waiting on the following merge policies.

• ❓ Waiting on checks: .NET Core CLI CI, .NET Core CLI CI (Build Linux Build_LinuxPortable_NoSuffix_Release_x64), .NET Core CLI CI (Build Linux Build_LinuxPortable_Release_x64), .NET Core CLI CI (Build Linux Build_Linux_musl_Debug_x64), .NET Core CLI CI (Build Linux Build_Rhel_6_Debug_x64), .NET Core CLI CI (Build Linux Build_Rhel_7_2_Release_x64), .NET Core CLI CI (Build Linux Build_Debian_jessie_Debug_x64), .NET Core CLI CI (Build Linux Build_CentOS_7_1_Debug_x64), .NET Core CLI CI (Build Linux Build_OpenSUSE_42_3_Debug_x64), .NET Core CLI CI (Build Linux Build_Fedora_27_Debug_x64), .NET Core CLI CI (Build Darwin Build_Release), .NET Core CLI CI (Build Linux Build_Ubuntu_18_04_Debug_x64), .NET Core CLI CI (Build Linux Build_Ubuntu_16_04_Debug_x64), .NET Core CLI CI (Build Windows_NT Build_Release_x64), .NET Core CLI CI (Build Windows_NT Build_DropSuffix_Release_x64), .NET Core CLI CI (Build Linux Build_Ubuntu_14_04_Release_x64), .NET Core CLI CI (Build Windows_NT Build_ES_Debug_x64), .NET Core CLI CI (Build Windows_NT Build_Debug_x86)
• ✔️ Standard Merge Policies Succeeded - No reviews have requested changes.