e.54.2.c (main): Use N / 8 instead of 32 as block_size.

	* libgomp.c/examples-4/e.54.2.c (main): Use N / 8 instead
	of 32 as block_size.
	* libgomp.fortran/examples-4/e.54.2.f90 (e_54_1): Use n / 8
	instead of 32 as block_size.

From-SVN: r217579