exp_ch7.adb (Build_Invariant_Procedure_Body): Semi-insert the body into the tree...

exp_ch7.adb (Build_Invariant_Procedure_Body): Semi-insert the body into the tree for GNATprove by setting its Parent field.

2017-01-19  Claire Dross  <dross@adacore.com>

	* exp_ch7.adb (Build_Invariant_Procedure_Body): Semi-insert the
	body into the tree for GNATprove by setting its Parent field. The
	components invariants of composite types are not checked by
	the composite type's invariant procedure in GNATprove mode.
	(Build_Invariant_Procedure_Declaration): Semi-insert the
	declaration into the tree for GNATprove by setting its Parent
	field.
	* freeze.adb (Freeze_Arry_Type):In GNATprove mode, do not add
	the component invariants to the array type  invariant procedure
	so that the procedure can be used to  check the array type
	invariants if any.
	(Freeze_Record_Type): In GNATprove mode, do
	not add the component invariants to the record type  invariant
	procedure so that the procedure can be used to	check the record
	type invariants if any.

From-SVN: r244629