chinese/librime: Fix dependencies and improve port
- Switch from PORTVERSION to DISTVERSION
- Remove devel/capnproto (not used)
- Remove gettext dependency (not used)
- Update USES= compiler args
- Add USES= pathfix
- Remove USE_CXXSTD, upstream already defines c++17
- Fix some portlint warnings
References:
https://github.com/rime/librime/blob/1.14.0/CMakeLists.txt#L6
https://github.com/rime/librime/blob/1.14.0/CMakeLists.txt#L178
Approved by: blanket, build fix