glibc 2.9 introduced the htole<16/32/64> macros, add them to
tools/include to support older versions of glibc.
Reported-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NPeter Foley <pefoley2@pefoley.com>
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>