Merge ""desktop" linux has Posix clocks."

/*

 * Define this if have clock_gettime() and friends

 *

 * Desktop Linux has this in librt, but it's broken in goobuntu, yielding

 * mildly or wildly inaccurate results.

 */

/*#define HAVE_POSIX_CLOCKS*/

#define HAVE_POSIX_CLOCKS

/*

 * Define this if we have linux style epoll()