Remove Pascal language in source code.

Remove Pascal language in source code.

2017-07-14  Martin Liska  <mliska@suse.cz>

	* dbxout.c (get_lang_number): Do not handle GNU Pascal.
	* dbxout.h (extern void dbxout_stab_value_internal_label_diff):
	Remove N_SO_PASCAL.
	* dwarf2out.c (lower_bound_default): Do not handle
	DW_LANG_Pascal83.
	(gen_compile_unit_die): Likewise.
	* gcc.c: Remove default extension binding for GNU Pascal.
	* stmt.c: Remove Pascal language from a comment.
	* xcoffout.c: Likewise.

From-SVN: r250197