sem_eval.adb (Eval_Concatenation): If left operand is a null string, get bounds from...

sem_eval.adb (Eval_Concatenation): If left operand is a null string, get bounds from right operand.

	* sem_eval.adb (Eval_Concatenation): If left operand is a null string,
	get bounds from right operand.

	* sem_eval.adb: Minor reformatting

	* exp_util.adb (Make_Literal_Range): use bound of literal rather
	than Index'First, its lower bound may be different from 1.

	* exp_util.adb: Undo earlier change, fixes ACVC regressions C48009B
	and C48009J

	* prj-nmsc.adb Minor reformatting

	* prj-nmsc.adb (Language_Independent_Check): Reset Library flag if
	set and libraries are not supported.

	* sem_ch3.adb (Build_Derived_Private_Type): set Public status of
	private view explicitly, so the back-end can treat as a global
	when appropriate.

From-SVN: r47692