* login/pututline_r.c: Fix typo in sizeof for DATA_TMP alloca.
* sysdeps/generic/gnu/types.h (__clock_t): New type.
* sysdeps/unix/sysv/linux/gnu/types.h (__clock_t, __fsid_t): Define
using kernel types.
* time/time.h (clock_t): Include <gnu/types.h> and define using
__clock_t.