Update dependencies from https://github.com/dotnet/arcade build 20190819.12 (#26274)

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19419.12
- Microsoft.DotNet.Build.Tasks.Feed - 2.2.0-beta.19419.12
- Microsoft.DotNet.Build.Tasks.Packaging - 1.0.0-beta.19419.12
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19419.12

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -2,21 +2,21 @@
   <ProductDependencies>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19416.16">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19419.12">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0e36c2410b72166a1b9a67142e652225e22feada</Sha>
+      <Sha>10b2260aeed5f07582bf8d8dcd4221a447b171c5</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.19416.16">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.19419.12">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0e36c2410b72166a1b9a67142e652225e22feada</Sha>
+      <Sha>10b2260aeed5f07582bf8d8dcd4221a447b171c5</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Feed" Version="2.2.0-beta.19416.16">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Feed" Version="2.2.0-beta.19419.12">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0e36c2410b72166a1b9a67142e652225e22feada</Sha>
+      <Sha>10b2260aeed5f07582bf8d8dcd4221a447b171c5</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Packaging" Version="1.0.0-beta.19416.16">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Packaging" Version="1.0.0-beta.19419.12">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0e36c2410b72166a1b9a67142e652225e22feada</Sha>
+      <Sha>10b2260aeed5f07582bf8d8dcd4221a447b171c5</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Private.CoreFx.NETCoreApp" Version="4.6.0-preview9.19419.5">
       <Uri>https://github.com/dotnet/corefx</Uri>

eng/Versions.props

@@ -15,8 +15,8 @@
     <UsingToolXliff>false</UsingToolXliff>
     <!-- Package versions -->
     <!-- arcade -->
-    <MicrosoftDotNetBuildTasksFeedVersion>2.2.0-beta.19416.16</MicrosoftDotNetBuildTasksFeedVersion>
-    <MicrosoftDotNetBuildTasksPackagingVersion>1.0.0-beta.19416.16</MicrosoftDotNetBuildTasksPackagingVersion>
+    <MicrosoftDotNetBuildTasksFeedVersion>2.2.0-beta.19419.12</MicrosoftDotNetBuildTasksFeedVersion>
+    <MicrosoftDotNetBuildTasksPackagingVersion>1.0.0-beta.19419.12</MicrosoftDotNetBuildTasksPackagingVersion>
     <MicrosoftDotNetXUnitConsoleRunnerVersion>2.5.1-beta.19278.1</MicrosoftDotNetXUnitConsoleRunnerVersion>
     <!-- roslyn -->
     <MicrosoftNetCompilersToolsetVersion>3.3.0-beta2-19367-02</MicrosoftNetCompilersToolsetVersion>

global.json

@@ -7,8 +7,8 @@
     "python": "2.7.15"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19416.16",
-    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19416.16",
+    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19419.12",
+    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19419.12",
     "Microsoft.Build.NoTargets": "1.0.53",
     "Microsoft.Build.Traversal": "2.0.2"
   }