Update dependencies from https://github.com/dotnet/core-setup build 20190409.15 (#554)

- Microsoft.NETCore.App - 3.0.0-preview4-27609-15

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -41,9 +41,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>e0a01a12c2676d69cefa61aa2526a414d7f2dabb</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NETCore.App" Version="3.0.0-preview4-27609-12">
+    <Dependency Name="Microsoft.NETCore.App" Version="3.0.0-preview4-27609-15">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>89ba5a781188bb95f7de3c2714fdddd19f341f32</Sha>
+      <Sha>7909358bab9549134b2cf126148c6896633a4653</Sha>
     </Dependency>
     <Dependency Name="System.Reflection.MetadataLoadContext" Version="4.6.0-preview4.19208.6" CoherentParentDependency="Microsoft.NETCore.App">
       <Uri>https://github.com/dotnet/corefx</Uri>