python3: disable debug build, drop testsuit
python3: disable debug build, drop testsuit

* turns out exportig OPT var disables debug build
* drop testsuite as it takes a lot of space, perhaps needs to be moved into a separate package
* should we drop __pycache__ as well?

Used https://git.centos.org/blob/rpms!rh-python36-python.git/c7/SPECS!python.spec#L1484
and https://packages.debian.org/source/buster/python3.6 as a reference

moochris/haikuports,haikuports/haikuports,haikuports/haikuports,haikuports/haikuports,miqlas/haikuports,moochris/haikuports,miqlas/haikuports,Begasus/haikuports,haikuports/haikuports,nielx/haikuports,nielx/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,haikuports/haikuports,nielx/haikuports,miqlas/haikuports,Begasus/haikuports,Begasus/haikuports