Ada merge -Wno-long-long

[Joseph S. Myers]

After the Ada merge I now get

gnatgcc -c -g  -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing-prototypes -Wtraditional -pedantic -Wno-long-long  -gnatpg 
-gnata -I- -I. -I../../../gcc-cvs/gcc/ada ../../../gcc-cvs/gcc/ada/ada.ads
gnat1: Invalid option `-Wno-long-long'

on bootstrap (GNAT 3.13p as bootstrap compiler).  It appears the correct
set of flags isn't being passed down for building Ada with a 2.8.1-based
compiler that doesn't understand -Wno-long-long.

-- 
Joseph S. Myers
jsm28@cam.ac.uk