re PR bootstrap/80897 (gnat bootstrap broken on SPARC64/Linux)

	PR bootstrap/80897
	* exp_ch3.adb (Make_Predefined_Primitive_Specs): Use Positive index.

From-SVN: r249119

gcc/ada/ChangeLog

 2017-06-12  Eric Botcazou  <ebotcazou@adacore.com>
 
+	PR bootstrap/80897
+	* exp_ch3.adb (Make_Predefined_Primitive_Specs): Use Positive index.
+
+2017-06-12  Eric Botcazou  <ebotcazou@adacore.com>
+
 	PR ada/81070
 	* s-interr-hwint.adb: Reinstate.
 	* gcc-interface/Makefile.in (RTEMS): Use it again.

gcc/ada/exp_ch3.adb

@@ -9216,7 +9216,7 @@ package body Exp_Ch3 is
 
       declare
          Stream_Op_TSS_Names :
-           constant array (Integer range <>) of TSS_Name_Type :=
+           constant array (Positive range <>) of TSS_Name_Type :=
              (TSS_Stream_Read,
               TSS_Stream_Write,
               TSS_Stream_Input,