Change -falign-functions=N to

    Align the start of functions to the next power-of-two greater than
    or equal to N.

Add

    If '-falign-labels' is greater than this value, then its value is
    used instead.

to -falign-loops=N and -falign-jumps=N.

	PR driver/94381
	* doc/invoke.texi: Update -falign-functions, -falign-loops and
	-falign-jumps documentation.