HipHop build support files.

HipHop build support files.
* Added a script called "make" which works around some of the inadequacies in the hphp build system:
** Allow incremental rebuilds. CMake is very smart and can do this with very little prompting, including header dependencies. This cuts down the build time for certain types of small change in the PHP source.
** Use ccache if it is present.
** Use debug mode, don't strip symbols.

* Added a script which runs the compiled program in server mode
* Added a PHP file list which is greatly cut down to reduce build time. Suitable only for initial testing. Current MediaWiki build time is about 36 minutes on my laptop.