Update dependencies from https://github.com/dotnet/standard build 20190327.2 (dotnet#36444)

- NETStandard.Library - 2.1.0-prerelease.19177.2

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -34,9 +34,9 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>69f276904fdd6d8f81404b857f295537894b81d3</Sha>
     </Dependency>
-    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19176.2">
+    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19177.2">
       <Uri>https://github.com/dotnet/standard</Uri>
-      <Sha>d759ace4885e63a5d60ccd5bc99657c54ff07463</Sha>
+      <Sha>95b8ab66649877d199c425c52d60b9b46a839d60</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.19177.11">
       <Uri>https://github.com/dotnet/arcade</Uri>

eng/Versions.props

@@ -43,7 +43,7 @@
     <!-- Corefx dependencies -->
     <MicrosoftNETCorePlatformsPackageVersion>3.0.0-preview4.19177.1</MicrosoftNETCorePlatformsPackageVersion>
     <!-- Standard dependencies -->
-    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19176.2</NETStandardLibraryPackageVersion>
+    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19177.2</NETStandardLibraryPackageVersion>
     <!-- dotnet-optimization dependencies -->
     <optimizationwindows_ntx64IBCCoreFxPackageVersion>99.99.99-master-20190308.5</optimizationwindows_ntx64IBCCoreFxPackageVersion>
   </PropertyGroup>