cobol: Improved MOVE routines.

Faster routine for converting numeric-display numerical strings to
binary values.  Improved conversion of binary values to big-endian
COMP-4 values.

gcc/cobol/ChangeLog:

	* cbldiag.h (current_program_index): Suppress cppcheck warning.
	(struct cbl_loc_t): Likewise.
	* genutil.cc (get_depending_on_value_from_odo): Check subscript
	against occurs-depending-on value.
	(get_data_offset): Likewise.
	(digit): Fast string-to-binary routine.
	(num_disp_dive): Likewise.
	(get_binary_value_tree): Likewise.
	(copy_little_endian_into_place): Move the function to move.cc.
	(get_location): Normalize use of "data" pointer versus using the
	address of a known variable.
	* genutil.h (copy_little_endian_into_place): Remove declarations.
	* move.cc (get_reference_to_data): Eliminate function.
	(mh_identical): Simplify the logic that uses get_location.
	(copy_little_endian_into_place):  Use the routine for both little-
	and big-endian targets.  Take absolute value of signed inputs when
	the target is unsigned.
	(mh_little_endian): Handle both little- and big-endian targets.
	* symbols.cc (cbl_alphabet_t::cbl_alphabet_t):  Suppress
	cppcheck warning.