Update dependencies from https://github.com/dotnet/core-setup build 20190814.20 (#26185)

- Microsoft.NETCore.App - 5.0.0-alpha1.19414.20

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -27,9 +27,9 @@
  <Uri>https://github.com/dotnet/corefx</Uri>
  <Sha>af36939acdf751d2465358be3f892170f73f9b48</Sha>
  </Dependency>
- <Dependency Name="Microsoft.NETCore.App" Version="5.0.0-alpha1.19414.3">
+ <Dependency Name="Microsoft.NETCore.App" Version="5.0.0-alpha1.19414.20">
  <Uri>https://github.com/dotnet/core-setup</Uri>
- <Sha>78ceba2f4147bb8976fb1858aa50f7da50166b54</Sha>
+ <Sha>aae3e31d0011b09c8277d2f06f00b07e1fba8cb5</Sha>
  </Dependency>
  <Dependency Name="optimization.IBC.CoreCLR" Version="99.99.99-master-20190716.1">
  <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-optimization</Uri>

eng/Versions.props

@@ -23,7 +23,7 @@
  <MicrosoftNETCorePlatformsVersion>5.0.0-alpha1.19412.11</MicrosoftNETCorePlatformsVersion>
  <MicrosoftBclAsyncInterfacesVersion>1.0.0-preview7.19326.2</MicrosoftBclAsyncInterfacesVersion>
  <!-- core-setup -->
- <MicrosoftNETCoreAppVersion>5.0.0-alpha1.19414.3</MicrosoftNETCoreAppVersion>
+ <MicrosoftNETCoreAppVersion>5.0.0-alpha1.19414.20</MicrosoftNETCoreAppVersion>
  <!-- dotnet-optimization -->
  <optimizationIBCCoreCLRVersion>99.99.99-master-20190716.1</optimizationIBCCoreCLRVersion>
  <optimizationPGOCoreCLRVersion>99.99.99-master-20190716.1</optimizationPGOCoreCLRVersion>