This patch allows building an x86-64 gdbserver for a multilibbed 
i686-pc-linux-gnu target.  One cannot tell from the target triplet that x86-64 
source files are needed -- one must invoke the compiler and examine the 
__x86_64__ #define.  For instance, the CC_FOR_TARGET may be 'my-gcc -m64'.

built and tested for an m64 multilib of an i686-pc-linux-gnu target.  ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::         CodeSourcery