Make optimise compilation usable; fix some asm

Enable STRIP and fix its build rule.

DEBUG=n make incredibly boosts the whole sieve actually. I should have taken
those times for the paper: they're less than half the ones I showed there
and tend to fall relatively (10e1{0,1} are less than a third)...

Use a hard-coded FPU control register value.

Fix memcpy() - it used twice movsq instead of movsb in the second place.
New attempt for fast Lambda'

The lambda-prime-f2 does not work currently. I'll work on that. It should be
faster than the first attempt being more realistic and programming with
recursion.

Rename lambda-prime-fast.c to a shorter form.
Use the Makefile.build submodule

Import the new Makefile.build repository as a submodule. I'll have fun with
that installation.

Make some notes about future fast Lambda' programs in the TODO.

One update regarding the lost "Running" message. I was brought to this
rationale by answering wrong at kernel-newbies about fd locking and being
corrected fortunately. I knew there was flock() and stuff but didn't realise
that it belonged to this matter. However: The threads shared the same stdout
fd and wrote concurrently to it. There definitely _is_ a race - my program
is guilty.