Updating NuGet to 4.6.1-rtm-5019

Author: Livar Cunha

build/DependencyVersions.props

@@ -31,7 +31,7 @@
     <MicrosoftDotNetProjectJsonMigrationPackageVersion>1.2.1-alpha-002133</MicrosoftDotNetProjectJsonMigrationPackageVersion>
     <MicrosoftDotNetToolsMigrateCommandPackageVersion>$(MicrosoftDotNetProjectJsonMigrationPackageVersion)</MicrosoftDotNetToolsMigrateCommandPackageVersion>
     <MicrosoftDiaSymReaderNativePackageVersion>1.6.0-beta2-25304</MicrosoftDiaSymReaderNativePackageVersion>
-    <NuGetBuildTasksPackageVersion>4.6.0-rtm-4918</NuGetBuildTasksPackageVersion>
+    <NuGetBuildTasksPackageVersion>4.6.1-rtm-5019</NuGetBuildTasksPackageVersion>
     <NuGetBuildTasksPackPackageVersion>$(NuGetBuildTasksPackageVersion)</NuGetBuildTasksPackPackageVersion>
     <NuGetCommonPackageVersion>$(NuGetBuildTasksPackageVersion)</NuGetCommonPackageVersion>
     <NuGetCommandLineXPlatPackageVersion>$(NuGetBuildTasksPackageVersion)</NuGetCommandLineXPlatPackageVersion>

build/NugetConfigFile.targets

@@ -31,6 +31,7 @@
 <add key="symreader-native" value="https://dotnet.myget.org/F/symreader-native/api/v3/index.json" />
 <add key="AspNetMaster" value="https://dotnet.myget.org/F/aspnetcore-master/api/v3/index.json" />
 <add key="AspNetDev" value="https://dotnet.myget.org/F/aspnetcore-dev/api/v3/index.json" />
+<add key="nuget-build" value="https://dotnet.myget.org/F/nuget-build/api/v3/index.json" />
         ]]>
       </NugetConfigCLIFeeds>