* Add serenity to librt whitelist
This patch adds serenity to the list of operating systems that dont require librt to be explicity linked
* Disable PCRE2 JIT compilation
* Remove resolve_heap_tcache implementation
Serenity doesn't implement thread caching in its memory allocator, so tcache resolution is not applicable.
* Define rz_sys_pipe as pipe2 for serenity
* Add serenity identifier to rz_types.h
Define serenity as __UNIX__ like, and set RZ_SYS_OS to 'serenity' if __serenity__ identifier is defined
* Add zlib dependency for libzip
ab82fc9fa3