On glibc this builds fine; on musl the byteswap header doesn't seem to be
included properly. This change adds it, fixing the build.
Type: fix
Change-Id: I402812409395d471357b6317084774afba39548f
Signed-off-by: Eric Sun <esun@meraki.com>
Signed-off-by: Pierre Pfister <ppfister@cisco.com>