Revert "ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo"

This reverts commit 9fc2105aeaaf56b0cf75296a84702d0f9e64437b.

jackd (used by sonic-pi) parses this value. Revert this patch temporarily
until we're able to find a better solution.
debian: Compile in 10 threads

This change is related to our dev server ONLY. It's much faster when we compile
the package in multiple threads.