FSharp.Compiler.Private files not showing

Repro:

1. Checkout `https://github.com/Microsoft/visualfsharp`
2. As per README.md, run `sh ./build.sh`.
3. Let it do its thing.
4. When it's done, open FSharp.sln in Rider.
5. Look at FSharp.Compiler.Private in the Solution Explorer.
6. Look at the source of the project file.

Majority of files are missing. Is that expected?


Follow README.md and run build.sh, then open FSharp.sln and inspect FSharp.Compiler.Private in Rider alongside its project file. Compare the generated solution view with the project contents and determine whether the missing files are expected; done means the behavior is explained and, if unintended, a reproducible correction is identified.

Written by the indexing model from the issue text.