cobol: Improve binary-to-string conversion.

cobol: Improve binary-to-string conversion.

COBOL often requires the conversion of binary integers to string of characters.
These changes replace a naive routine that peels decimal digits from a binary
value one digit at a time, with a divide-and-conquer algorithm that is twice as
fast even for a couple of digits, and is about eight times faster past ten
digits.

Included here are some minor fixes to the lexer and parser.

gcc/cobol/ChangeLog:

	* cbldiag.h (location_dump): Source code formatting.
	* parse.y: error_msg formatting.
	* scan.l: Remove UTF-8 character from regex pattern.
	* scan_ante.h (numstr_of): error_msg formatting.
	* show_parse.h (class ANALYZE): Suppress cppcheck error.
	* util.cc (cbl_field_t::report_invalid_initial_value):
	error_msg formatting.

libgcobol/ChangeLog:

	* Makefile.am: Include new stringbin.cc file.
	* Makefile.in: Regenerated.
	* libgcobol.cc (__gg__power_of_ten): Improve error message.
	(__gg__binary_to_string): Deleted.
	(__gg__binary_to_string_internal): Deleted.
	(int128_to_field): Use new conversion routine.
	(__gg__move): Use new conversion routine.
	* stringbin.cc: New file. Implements new conversion routine.
	* stringbin.h: New file. Likewise.