* sysdeps/mach/hurd/i386/sigreturn.c: Restore the FPU state.
* stdlib/random.c (__srandom): Change algorithm used to populate
the state array.
(randtbl): Recomputed with new algorithm.
* sysdeps/mach/pagecopy.h: New file.
* sysdeps/generic/pagecopy.h: New file.
* sysdeps/generic/memcpy.c: Include pagecopy.h; call
PAGE_COPY_FWD_MAYBE first when word aligned.
* sysdeps/generic/memmove.c: Likewise.