[release/3.0] Update dependencies from dotnet/source-build-reference-packages (#1325)

* Update dependencies from https://github.com/dotnet/source-build-reference-packages build 20191017.1

- Private.SourceBuild.ReferencePackages - 1.0.0-beta.19517.1

Dependency coherency updates

- Microsoft.NETCore.Runtime.CoreCLR - 3.0.0-rc2.19462.5 (parent: Microsoft.Private.CoreFx.NETCoreApp)
- Microsoft.Private.CoreFx.NETCoreApp - 4.6.0-rc2.19462.14 (parent: Microsoft.NETCore.App)
- Microsoft.NETCore.App - 3.0.0-rc2-19463-05 (parent: Microsoft.Dotnet.Sdk.Internal)

* Revert changes

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -5,9 +5,9 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>ce459ae07c3d7a1e68251268855e0bc7b3d97f75</Sha>
     </Dependency>
-    <Dependency Name="Private.SourceBuild.ReferencePackages" Version="1.0.0-beta.19514.1">
+    <Dependency Name="Private.SourceBuild.ReferencePackages" Version="1.0.0-beta.19517.1">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>acd7da673fe41f51f0bc517c30271ff467885099</Sha>
+      <Sha>ec45393cbda8cd06399c88b147ea319e743f64ee</Sha>
     </Dependency>
   </ToolsetDependencies>
   <ProductDependencies>

eng/Versions.props

@@ -7,7 +7,7 @@
   </PropertyGroup>
   <!-- Production Dependencies -->
   <PropertyGroup>
-    <PrivateSourceBuildReferencePackagesPackageVersion>1.0.0-beta.19514.1</PrivateSourceBuildReferencePackagesPackageVersion>
+    <PrivateSourceBuildReferencePackagesPackageVersion>1.0.0-beta.19517.1</PrivateSourceBuildReferencePackagesPackageVersion>
     <PrivateSourceBuiltArtifactsPackageVersion>0.1.0-3.0.100</PrivateSourceBuiltArtifactsPackageVersion>
   </PropertyGroup>
 </Project>