User-specified static library could not be loaded (.../_solib_k8/.../libz.so)

`hrepl` fails to load targets that depend on certain types of dynamic libraries.

This can be reproduced on the rules_haskell repository with the following command:
```
$ nix-shell --run 'hrepl //tests/binary-with-indirect-sysdeps:hs-lib'
GHCi, version 8.6.5: http://www.haskell.org/ghc/ :? for help
: User-specified static library could not be loaded (/home/aj/.cache/bazel/_bazel_aj/021cc9f0bfc60754963d997427e7eb3e/execroot/rules_haskell/bazel-out/k8-fastbuild/bin/_solib_k8/_U@zlib.dev_S_S_Czlib___Uexternal_Snixpkgs_Uzlib_Slib/libz.so)
Loading static libraries is not supported in this configuration.
Try using a dynamic library instead.

Error running GHCi.
```

Using the `--show-commands` flag shows that GHCi is passed the following flags:
```
-lz -lz.so -lz.so.1.2
```
This seems to be the source of the issue and seems to be caused by the following line in hrepl: https://github.com/google/hrepl/blob/33f879eecd986c92ba67f31aec05e3d7f4fbc025/hrepl/Repl.hs#L239
That logic to obtain the library name from a file name fails on versioned libraries like `libz.so.1.2.11`, or on system libraries outside of Linux, e.g. `libz.dylib`.

The target `//tests/binary-with-indirect-sysdeps:hs-lib` depends on a `libz` that is provided by nixpkgs and comes in three shapes: `libz.so libz.so.1 libz.so.1.2.11`.

hrepl revision 33f879eecd986c92ba67f31aec05e3d7f4fbc025
rules_haskell revision b41234677c9381982aae98098fb473a5b733c945