Fixes include `CMAKE_INSTALL_INCLUDEDIR` since target `scn::scn` lost
`INTERFACE_INCLUDE_DIRECTORIES`,
Fixed by backporting upstream patches in
https://github.com/eliaskosunen/scnlib/pull/111.
Format and unify `EOL` to `LF` of `portfile.cmake`.
### Checklist
- [x] Changes comply with the [maintainer
guide](https://github.com/microsoft/vcpkg-docs/blob/main/vcpkg/contributing/maintainer-guide.md).
- [x] SHA512s are updated for each updated download.
- [ ] ~The "supports" clause reflects platforms that may be fixed by
this new version.~
- [x] Any fixed [CI
baseline](https://github.com/microsoft/vcpkg/blob/master/scripts/ci.baseline.txt)
entries are removed from that file.
- [x] Any patches that are no longer applied are deleted from the port's
directory.
- [x] The version database is fixed by rerunning `./vcpkg x-add-version
--all` and committing the result.
- [x] Only one version is added to each modified port's versions file.
### Test
The port usage tests pass with the following triplets:
* x64-linux
* x64-windows
de9557b47b