New file.

From-SVN: r177193

gcc/ada/a-extiin.ads

+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--         A D A . E X E C U T I O N _ T I M E . I N T E R R U P T S        --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT.  In accordance with the copyright of that document, you can freely --
+-- copy and modify this specification,  provided that if you redistribute a --
+-- modified version,  any changes that you have made are clearly indicated. --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ada.Interrupts;
+
+package Ada.Execution_Time.Interrupts is
+
+   pragma Unimplemented_Unit;
+
+   function Clock (Interrupt : Ada.Interrupts.Interrupt_Id) return CPU_Time;
+
+   function Supported (Interrupt : Ada.Interrupts.Interrupt_Id) return Boolean;
+
+end Ada.Execution_Time.Interrupts;