Update dependencies from https://github.com/dotnet/arcade build 20201204.2 (#9197)

[master] Update dependencies from dotnet/arcade
- Coherency Updates:
  - Microsoft.SourceLink.GitHub: from 1.1.0-beta-20566-02 to 1.1.0-beta-20580-02 (parent: Microsoft.DotNet.Arcade.Sdk)
  - XliffTasks: from 1.0.0-beta.20568.1 to 1.0.0-beta.20574.1 (parent: Microsoft.DotNet.Arcade.Sdk)

eng/common/tools.sh

@@ -441,8 +441,17 @@ function MSBuild-Core {
 
     "$_InitializeBuildTool" "$@" || {
       local exit_code=$?
-      Write-PipelineTaskError "Build failed (exit code '$exit_code')."
-      ExitWithExitCode $exit_code
+      # We should not Write-PipelineTaskError here because that message shows up in the build summary
+      # The build already logged an error, that's the reason it failed. Producing an error here only adds noise.
+      echo "Build failed with exit code $exit_code. Check errors above."
+      if [[ "$ci" == "true" ]]; then
+        Write-PipelineSetResult -result "Failed" -message "msbuild execution failed."
+        # Exiting with an exit code causes the azure pipelines task to log yet another "noise" error
+        # The above Write-PipelineSetResult will cause the task to be marked as failure without adding yet another error
+        ExitWithExitCode 0
+      else
+        ExitWithExitCode $exit_code
+      fi
     }
   }