qemu-*: move from testing to main (!1121)

For testing changes for device categorization, it is useful to have
a device in each of the categories. The PinePhone is close to being
moved to main/, but it doesn't fulfill all requirements yet.

The QEMU "device ports" are very simple since QEMU currently only
emulates a rather limited set of hardware features. All available features
are working correctly (especially after the recent rework of the QEMU
packages). I suppose it is also usable as a "daily driver", at least for
its intended purpose (a virtual machine for testing postmarketOS changes). :)

Given that everyone can run QEMU, everyone could potentially maintain
it. For now I have added myself as maintainer since I did most of the
recent cleanup. Add drebrez as second maintainer.

Overall it seems useful to have qemu-* in main/, especially because
it is now the device that is selected by default in pmbootstrap.

device/main/device-qemu-aarch64/APKBUILD

@@ -1,6 +1,8 @@
 # Reference: <https://postmarketos.org/devicepkg>
 # Contributor: Oliver Smith <ollieparanoid@postmarketos.org>
 # Contributor: Minecrell <minecrell@minecrell.net>
+# Maintainer: Minecrell <minecrell@minecrell.net>
+# Maintainer: Daniele Debernardi <drebrez@gmail.com>
 pkgname=device-qemu-aarch64
 pkgver=2
 pkgrel=0

device/main/device-qemu-amd64/APKBUILD

@@ -1,6 +1,8 @@
 # Reference: <https://postmarketos.org/devicepkg>
 # Contributor: Oliver Smith <ollieparanoid@postmarketos.org>
 # Contributor: Minecrell <minecrell@minecrell.net>
+# Maintainer: Minecrell <minecrell@minecrell.net>
+# Maintainer: Daniele Debernardi <drebrez@gmail.com>
 pkgname=device-qemu-amd64
 pkgver=2
 pkgrel=0