target-supports.exp (check_no_compiler_messages): New procedure.

	* lib/target-supports.exp (check_no_compiler_messages): New procedure.
	(check_visibility_available): Use it.
	(check_effective_target_default_packed): Likewise.
	(check_effective_target_pcc_bitfield_type_matters): Likewise.
	(check_effective_target_fopenmp): Likewise.
	(check_effective_target_freorder): Likewise.
	(check_effective_target_fpic): Likewise.
	(check_named_sections_available): Likewise.
	(check_effective_target_ilp32): Likewise.
	(check_effective_target_lp64): Likewise.

From-SVN: r112232