[master] Update dependencies from dotnet/coreclr (dotnet/corefx#41023)

[master] Update dependencies from dotnet/coreclr (dotnet/corefx#41023)

* Update dependencies from https://github.com/dotnet/coreclr build 20190910.9

- Microsoft.NET.Sdk.IL - 5.0.0-alpha1.19460.9
- Microsoft.NETCore.ILAsm - 5.0.0-alpha1.19460.9
- Microsoft.NETCore.Runtime.CoreCLR - 5.0.0-alpha1.19460.9

* Update dependencies from https://github.com/dotnet/coreclr build 20190911.7

- Microsoft.NET.Sdk.IL - 5.0.0-alpha1.19461.7
- Microsoft.NETCore.ILAsm - 5.0.0-alpha1.19461.7
- Microsoft.NETCore.Runtime.CoreCLR - 5.0.0-alpha1.19461.7

* Update StringComparerTests.netcoreapp.cs

Commit migrated from https://github.com/dotnet/corefx/commit/fdb13cc7ee134a17fb36a038b57795b7e2225274