[main] Update dependencies from mono/linker (#56905)

* Update dependencies from https://github.com/mono/linker build 20210804.1

Microsoft.NET.ILLink.Tasks
 From Version 6.0.100-preview.6.21403.3 -> To Version 6.0.100-preview.6.21404.1

* Update dependencies from https://github.com/mono/linker build 20210805.1

Microsoft.NET.ILLink.Tasks
 From Version 6.0.100-preview.6.21403.3 -> To Version 6.0.100-preview.6.21405.1

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -186,9 +186,9 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>95863758cd16c345d0b8fca067d5db5d6901e498</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="6.0.100-preview.6.21403.3">
+    <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="6.0.100-preview.6.21405.1">
       <Uri>https://github.com/mono/linker</Uri>
-      <Sha>7cb5aafb7314384229bd05b2aeb9e21805f463f9</Sha>
+      <Sha>ffe71535ba927280e6e93db0ca04dd99bde07637</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="1.0.0-prerelease.21373.1">
       <Uri>https://github.com/dotnet/xharness</Uri>

eng/Versions.props

@@ -168,7 +168,7 @@
     <!-- Docs -->
     <MicrosoftPrivateIntellisenseVersion>5.0.0-preview-20201009.2</MicrosoftPrivateIntellisenseVersion>
     <!-- ILLink -->
-    <MicrosoftNETILLinkTasksVersion>6.0.100-preview.6.21403.3</MicrosoftNETILLinkTasksVersion>
+    <MicrosoftNETILLinkTasksVersion>6.0.100-preview.6.21405.1</MicrosoftNETILLinkTasksVersion>
     <MicrosoftNETILLinkAnalyzerPackageVersion>$(MicrosoftNETILLinkTasksVersion)</MicrosoftNETILLinkAnalyzerPackageVersion>
     <!-- ICU -->
     <MicrosoftNETCoreRuntimeICUTransportVersion>6.0.0-rc.1.21369.1</MicrosoftNETCoreRuntimeICUTransportVersion>