sem_aggr.adb, [...]: General cleanup of static predicate handling.

sem_aggr.adb, [...]: General cleanup of static predicate handling.

2014-07-29  Robert Dewar  <dewar@adacore.com>

	* sem_aggr.adb, exp_ch5.adb, sem_ch5.adb, exp_util.adb, einfo.adb,
	einfo.ads, sem_util.adb, sem_attr.adb, sem_case.adb, sem_eval.adb,
	sem_eval.ads, sem_ch13.adb: General cleanup of static predicate
	handling. Change name of Discrete_Predicate to
	Discrete_Static_Predicate, and replace testing of the presence of this
	field by testing the flag Has_Static_Expression.

From-SVN: r213161