configure: detect endian via compile test

configure: detect endian via compile test

This avoids needing to execute a program and keeping an (incomplete)
list when cross-compiling.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Tested-by: James Hogan <james.hogan@imgtec.com> [mips]
Message-id: 1372649418-4987-1-git-send-email-vapier@gentoo.org
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
(cherry picked from commit 61cc919f73ea7ca134c0ac41b748981ad63a253b)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>