[PATH] fix PR libstdc++/9815: atomicity.h - fails to compile with -O3 -masm=intel

[Benjamin Kosnik]

>> 2003-05-24  Andrew Pinski  <pinskia@physics.uc.edu>
>>
>> 	* config/cpu/i386/atomicity.h (__exchange_and_add): add intel
>> 	asm case to asm.
>> 	* config/cpu/i486/atomicity.h (__exchange_and_add): Likewise.
>> 	(__atomic_add): likewise.

This seems harmless but the person who approves this is the x86 maintainer.
According to gcc/MAINTAINERS, this is:

i386 port		Richard Henderson	rth@redhat.com

best,
benjamin