Foreign libs not reconfigured when dependency versions change

I have a package with both a regular library (lib) and a foreign-lib (flib) which depends on the former. If I build this package with new-build and then change the version constraint of a dependency of lib the resulting flib is linked against the correct version of the dependencies' .so but the RPATH/RUNPATH in flib still mentions only the old dependency version.

Here is a minimal reproducer: https://github.com/DanielG/cabal-flib-invalid-cache-repro

The `./repro.sh` script just builds the package twice, once with `--constraint 'bytestring ==0.9.2.1'` and once with `--constraint 'bytestring ==0.10.8.1'` and then calls `ldd` and `objdump -x` (to get the RPATH). As can be seen from the output (reproduced in the README there) the `R*PATH` is incorrect.

I've looked into what is causing this and it seems the flib is not getting reconfigured when the dependency version of the lib changes and thus it's still using the old `LocalBuildInfo` structure for the `Distribution.Simple.GHC.getRPaths`.

I'm not exactly sure but I think if've tracked it down to `Distribution.Client.ProjectBuilding.rebuildTargetsDryRun` which generates the `BuildStatusMap`, specifically the call to `checkPackageFileMonitorChanged` in there but I'm really quite confused about how this "monitor" buissness all ties togeter.