`msleep` should divide input into seconds and nanoseconds for bigger accepted input range

[RobertBendun]

Code to improve:

stacky/std/time.stacky

Lines 22 to 26 in cb31882

	msleep fun # miliseconds --
	timespec timespec.tv_sec + 0 store64
	timespec timespec.tv_nsec + swap 1000000 * store64
	while timespec timespec SYS_nanosleep syscall2 0 < do end
	end