[Ada] Fix deleting CodePeer files for non-ordinary units

[Pierre-Marie de Rodat via Gcc-patches]

A routine for deleting SCIL files generated by previous CodePeer runs
didn't expect compilation units that are subprogram renamings, generic
renamings and generic subprogram declarations.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

        * comperr.adb (Delete_SCIL_Files): Handle generic subprogram
        declarations and renaming just like generic package declarations
        and renamings, respectively; handle
        N_Subprogram_Renaming_Declaration.
diff --git a/gcc/ada/comperr.adb b/gcc/ada/comperr.adb
--- a/gcc/ada/comperr.adb
+++ b/gcc/ada/comperr.adb
@@ -478,6 +478,7 @@ package body Comperr is
          when N_Package_Declaration
             | N_Subprogram_Body
             | N_Subprogram_Declaration
+            | N_Subprogram_Renaming_Declaration
          =>
             Unit_Name := Defining_Unit_Name (Specification (Main));
 
@@ -489,10 +490,10 @@ package body Comperr is
          =>
             Unit_Name := Defining_Unit_Name (Main);
 
-         --  No SCIL file generated for generic package declarations
+         --  No SCIL file generated for generic unit declarations
 
-         when N_Generic_Package_Declaration
-            | N_Generic_Package_Renaming_Declaration
+         when N_Generic_Declaration
+            | N_Generic_Renaming_Declaration
          =>
             return;