[Ada] Revert "Revamp dump and aux output names"

[Pierre-Marie de Rodat]

This reverts commit 593627b4562814d2206e53e9ad6ce2e85295aa58.

That commit was installed in GCC by mistake, bringing it in sync with an
earlier, internal transitory state that had just been resolved in a
separate patch.

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

gcc/ada/

        * switch.adb (Is_Internal_GCC_Switch): Revert accidental
        reintroduction of auxbase and auxbase-strip.
diff --git a/gcc/ada/switch.adb b/gcc/ada/switch.adb
--- a/gcc/ada/switch.adb
+++ b/gcc/ada/switch.adb
@@ -165,10 +165,7 @@ package body Switch is
           (Switch_Chars (First .. Last) = "-param"        or else
            Switch_Chars (First .. Last) = "dumpdir"       or else
            Switch_Chars (First .. Last) = "dumpbase"      or else
-           Switch_Chars (First .. Last) = "dumpbase-ext"  or else
-           -- Can we remove auxbase-strip and auxbase already?
-           Switch_Chars (First .. Last) = "auxbase-strip" or else
-           Switch_Chars (First .. Last) = "auxbase");
+           Switch_Chars (First .. Last) = "dumpbase-ext");
    end Is_Internal_GCC_Switch;
 
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