[patch] Enable Ada bootstrap with LTO

[Ralf Wildenhues]

* Eric Botcazou wrote on Sat, Nov 27, 2010 at 12:42:36AM CET:
> 2010-11-26  Eric Botcazou  <ebotcazou@adacore.com>
> 
> 	* bootstrap-lto.mk (BOOT_ADAFLAGS): Delete.
> 

FWIW, the build parts are obvious.

Thanks,
Ralf