Hi,

Some architectures have moved the asm/ into arch/ and some have not. This patch checks for a.out.h in both places before exporting it.

When building headers for arm I noticed that userspace headers need linux/byteorder.h and inturn swab.h also to be exported to userspace as asm/byteorder.h needs it.

I test build headers_install for all possible architecutures.

Thanks

-Khem