facebook/hhvm — pull request #3085 by paravoid (2014-07-02 02:28:21+00:00)
Title: CMake: distribute hphp/system/ public headers too

Add auto_sources/HHVM_PUBLIC_HEADERS under hphp/system/ as well, which
was forgotten from the initial build system improvements. This
distributes systemlib.h, among others, which is necessary for building
extensions.