* [lua] Add [cpp] feature to build lua-c++
* [lua] Switch tab for spaces in CMakeLists, set version to 5.3.5-2 as requested
* Use spaces for indentation
* upgrade lua to 5.3.5
* support POSIX systems
* bump version in CONTROL file
* -lm
* fix copyright check
* don't use c89 on windows
vs2015 already supports c99
* correct vcpkg_extract_source_archive_ex usage and platform detection
* fix FreeBSD