Update dependencies from https://github.com/dotnet/core-setup build 20200819.4 (#3432)

[release/3.1] Update dependencies from dotnet/core-setup
- Coherency Updates:
  - Microsoft.NETCore.Platforms: from 3.1.3 to 3.1.3 (parent: Microsoft.NETCore.App.Runtime.win-x64)

- Updates:
  - Microsoft.NETCore.App.Internal: from 3.1.8-servicing.20419.3 to 3.1.8-servicing.20419.4
  - Microsoft.NETCore.App.Runtime.win-x64: from 3.1.8 to 3.1.8
  - Microsoft.NETCore.Platforms: from 3.1.3 to 3.1.3

Author: dotnet-maestro[bot]

NuGet.config

@@ -3,8 +3,9 @@
   <packageSources>
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
-    <add key="darc-pub-dotnet-core-setup-dda80b2" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-core-setup-dda80b2d/nuget/v3/index.json" />
-    <add key="darc-pub-dotnet-corefx-d1252eb" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-corefx-d1252ebf/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-core-setup-dbf7119-1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-core-setup-dbf71190-1/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-core-setup-dbf7119" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-core-setup-dbf71190/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-corefx-d6302a7" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-corefx-d6302a72/nuget/v3/index.json" />
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
     <add key="dotnet3.1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1/nuget/v3/index.json" />
     <add key="dotnet3.1-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1-transport/nuget/v3/index.json" />

eng/Version.Details.xml

@@ -84,19 +84,19 @@
     -->
     <Dependency Name="Microsoft.NETCore.App.Runtime.win-x64" Version="3.1.8">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>dda80b2d16ab897bca1c4ab34e76f3a1967a36f5</Sha>
+      <Sha>dbf7119035ae350f32cbaba1f4e62a28efb08dbd</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Extensions.DependencyModel" Version="3.1.6">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-core-setup</Uri>
       <Sha>3acd9b0cd16596bad450c82be08780875a73c05c</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NETCore.App.Internal" Version="3.1.8-servicing.20419.3">
+    <Dependency Name="Microsoft.NETCore.App.Internal" Version="3.1.8-servicing.20419.4">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>dda80b2d16ab897bca1c4ab34e76f3a1967a36f5</Sha>
+      <Sha>dbf7119035ae350f32cbaba1f4e62a28efb08dbd</Sha>
     </Dependency>
     <Dependency Name="Microsoft.NETCore.Platforms" Version="3.1.3" CoherentParentDependency="Microsoft.NETCore.App.Runtime.win-x64">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>d1252ebf87b135e66c95087b40302c2474b77206</Sha>
+      <Sha>d6302a72f8eafa326d7572a02acf8f3021ebb9e8</Sha>
     </Dependency>
     <!-- Keep this dependency at the bottom of ProductDependencies, else it will be picked as the parent for CoherentParentDependencies -->
     <Dependency Name="Microsoft.NETCore.App.Ref" Version="3.1.0" Pinned="true">

eng/Versions.props

@@ -57,7 +57,7 @@
     <MicrosoftDotNetPlatformAbstractionsPackageVersion>3.1.6</MicrosoftDotNetPlatformAbstractionsPackageVersion>
     <MicrosoftNETCoreAppRefPackageVersion>3.1.0</MicrosoftNETCoreAppRefPackageVersion>
     <MicrosoftNETCoreAppRuntimewinx64PackageVersion>3.1.8</MicrosoftNETCoreAppRuntimewinx64PackageVersion>
-    <MicrosoftNETCoreAppInternalPackageVersion>3.1.8-servicing.20419.3</MicrosoftNETCoreAppInternalPackageVersion>
+    <MicrosoftNETCoreAppInternalPackageVersion>3.1.8-servicing.20419.4</MicrosoftNETCoreAppInternalPackageVersion>
     <NETStandardLibraryRefPackageVersion>2.1.0</NETStandardLibraryRefPackageVersion>
     <!-- Packages from dotnet/corefx -->
     <MicrosoftBclAsyncInterfacesPackageVersion>1.1.1</MicrosoftBclAsyncInterfacesPackageVersion>