sheep: use gcc builtin to get stack frame pointer

This remove hardcoded assembly which is not portable.

Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Reviewed-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
debian: speedup 'make deb'

Use 'timesize' instead of md5 will speed up the packaging a lot.
Alsl add --parallel for dh_auto_build so that we can specify
DEB_BUILD_OPTIONS=parallel=number to parallelize buliding as following:

$ DEB_BUILD_OPTIONS=parallel=8 make deb

Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
fix 'make rpm'

Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>

Conflicts:
	include/Makefile.am
	sheepdog.spec.in

The above conflicts are fixed manually by Hitoshi Mitake.

Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>