Use source format 3.0

Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>
Use quilt for patching

Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>
Fix gcc warnings and enable hardening

Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>
Add VERSION tag to m4

Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>
Enable multilib handling for ARM Cortex

Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>
Recommends: and Suggests: for packages

Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>