Migrate consumers of waf-utils.eclass to EAPI > 6

[NexAdn]

Today there was a patchset on gentoo-dev for dropping EAPI=6 support in waf-utils.eclass. Since we have a few packages which require waf-utils.eclass and are still on EAPI=6, we must expect ebuild failures in global scope to occur (and thus our ebuilds to break) soon.

Thus, we need to check the current list of EAPI=6 ebuilds if they can be bumped to EAPI=7 or EAPI=8:

$ grep -nR EAPI=6
media-libs/libmonome/libmonome-1.4.3.ebuild:4:EAPI=6
media-libs/libmonome/libmonome-9999.ebuild:4:EAPI=6
media-plugins/bitrot/bitrot-9999.ebuild:4:EAPI=6
media-plugins/deteriorate-lv2/deteriorate-lv2-1.0.7-r2.ebuild:4:EAPI=6
media-plugins/deteriorate-lv2/deteriorate-lv2-9999.ebuild:4:EAPI=6
media-sound/bitwig-studio/bitwig-studio-1.3.16.ebuild:8:EAPI=6
media-sound/bitwig-studio/bitwig-studio-2.5.1.ebuild:8:EAPI=6
media-sound/bitwig-studio/bitwig-studio-3.0.3.ebuild:8:EAPI=6
media-sound/bitwig-studio/bitwig-studio-3.2.8.ebuild:4:EAPI=6
media-sound/bitwig-studio/bitwig-studio-3.1.3.ebuild:4:EAPI=6
media-sound/cadence/cadence-9999-r7.ebuild:4:EAPI=6
media-sound/sequencer64/sequencer64-0.96.7.ebuild:4:EAPI=6
media-sound/sequencer64/sequencer64-0.96.8.ebuild:4:EAPI=6
media-sound/sequencer64/sequencer64-9999.ebuild:4:EAPI=6
media-sound/serialosc/serialosc-1.4.1.ebuild:4:EAPI=6
media-sound/serialosc/serialosc-9999.ebuild:4:EAPI=6
x11-libs/ntk/ntk-1.3.1001.ebuild:4:EAPI=6
x11-libs/ntk/ntk-9999.ebuild:4:EAPI=6

[NexAdn]

Found these waf-utils consumers with EAPI=6 (symlinked ebuilds might be mentioned with only one version):

• [x] libmonome-1.4.3.ebuild
• [x] bitrot-9999.ebuild
• [x] deteriorate-lv2-1.0.7-r2.ebuild
• [x] serialosc-1.4.1.ebuild
• [x] ntk-1.3.1001.ebuild

[NexAdn]

I'll start working on bumping these up to the latest EAPI. waf-utils.eclass recently got support for EAPI=8

[NexAdn]

serialosc needs verbumping. 1.4.1 doesn't work with recent Python versions anymore.

Edit: 9999 works like a charm, so I could at least verify that the live ebuild builds as intended.