This patch adds -m32 if gcc supports it, thus making it easier to 
compile the i386 architecture with an x86-64 compiler.

Note that it adds the option to CC, since it also affects assembly code 
and linking.  The extra level of indirection is because $(call 
cc-option) itself uses $(CC), so just doing CC += ... would cause $(CC) 
to be recursively defined.

	-hpa


Signed-Off-By: H. Peter Anvin <hpa@zytor.com>