[Ada] Inline all calls in Ada.Task_Identification

[Pierre-Marie de Rodat via Gcc-patches]

Code cleanup; all routines in Ada.Task_Identification had pragma Inline
except Activation_Is_Complete (and Image, which should rather stay like
that).

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

gcc/ada/

        * libgnarl/a-taside.ads (Activation_Is_Complete): Add pragma
        Inline.
diff --git a/gcc/ada/libgnarl/a-taside.ads b/gcc/ada/libgnarl/a-taside.ads
--- a/gcc/ada/libgnarl/a-taside.ads
+++ b/gcc/ada/libgnarl/a-taside.ads
@@ -94,6 +94,7 @@ is
      Volatile_Function,
      Pre    => T /= Null_Task_Id,
      Global => Tasking_State;
+   pragma Inline (Activation_Is_Complete);
 
 private
    pragma SPARK_Mode (Off);