re PR c/79834 (c/c-parser.c: make code more i18n-friendly)

re PR c/79834 (c/c-parser.c: make code more i18n-friendly)

	PR c/79834
c/
	* c-parser.c (c_parser_pragma): Use error_at instead of c_parser_error
	for "may only be used in compound statements" diagnostics, change it
	such that the same translatable string is used for all pragmas.  For
	PRAGMA_OACC_WAIT use "acc wait" rather than "acc enter data" in the
	diagnostics.
	(c_parser_omp_cancellation_point, c_parser_omp_target_update,
	c_parser_omp_target_enter_data, c_parser_omp_target_exit_data): Change
	"may only be used in compound statements" diagnostics, such that the
	same translatable string is used for all pragmas.
cp/
	* parser.c (cp_parser_omp_cancellation_point,
	cp_parser_omp_target_enter_data, cp_parser_omp_target_exit_data,
	cp_parser_omp_target_update): Change "may only be used in compound
	statements" diagnostics, such that the same translatable string is
	used for all pragmas.
	(cp_parser_pragma): Likewise.  Use error_at instead of
	cp_parser_error for that diagnostics.
testsuite/
	* c-c++-common/goacc/pragma_context.c (f2): Adjust expected
	diagnostics.

From-SVN: r245959