debug/strace: enforce cross-compilation

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Message-Id: <24b6540a08cbca7ee1fa.1363446263@laptop>
Patchwork-Id: 228220

 #!/bin/sh

 set -e

 printf "Running autoconf...\n"

 autoconf -Wall --force

 printf "Done. You may now run:\n    ./configure\n"