main/postmarketos-initramfs: add udev rules for devicemapper (MR 5764)

Without these rules, the /dev/disk/by-* stuff isn't created on devices
that use subpartitions (and maybe FDE too?), and systemd boot fails
because it's unable to find the boot partition UUID under that path.

fixes !5636

[ci:skip-build]: already built successfully in CI

main/postmarketos-initramfs/00-initramfs-extra-base.files

 /bin/udevadm
+/usr/lib/udev/rules.d/10-dm.rules
 /usr/lib/udev/rules.d/50-udev-default.rules
 /usr/lib/udev/rules.d/60-evdev.rules
 /usr/lib/udev/rules.d/60-input-id.rules
 /usr/lib/udev/rules.d/60-persistent-input.rules
 /usr/lib/udev/rules.d/60-persistent-storage.rules
 /usr/lib/udev/rules.d/64-btrfs.rules
+/usr/lib/udev/rules.d/66-kpartx.rules
 /usr/lib/udev/rules.d/70-mouse.rules
 /usr/lib/udev/rules.d/70-touchpad.rules
 /usr/lib/udev/rules.d/80-drivers.rules

main/postmarketos-initramfs/APKBUILD

 # Maintainer: Caleb Connolly <caleb@postmarketos.org>
 # Co-Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=postmarketos-initramfs
-pkgver=3.4.1
+pkgver=3.4.2
 pkgrel=0
 pkgdesc="Base files for the postmarketOS initramfs / initramfs-extra"
 url="https://postmarketos.org"
@@ -104,7 +104,7 @@ sha512sums="
 20bc7a21f4f59548b8179c5cb1fc2b3db64eb355988bce992db3bc4075d65b4135ff9dd7d754215d0402978811494449cce476a26cda6bb2f0f8b53ae8e36bd7  00-default.modules
 9c0e8f6f61d5da191e03a1aa9d5d0ceb5baf1eae6dbb9bfb0af59817783525119ac8394b135f303f7b6434a3eab0b49185fb90379e06823db847a4999c75ce33  00-initramfs-base.dirs
 c0233d22858a5901db64e1d2fe1f6d39a2e2cfd1b94a10932483f55fed9461e9b8aa2d73b154b9d99a7a8b49ee02abfbddfe917ce0c6d7576601ba2668589c01  00-initramfs-base.files
-d0db184a5af00047b5f2c4ae869324968cdd396a17ed2c146e2523669bcf25f9ffd805eba2ec01ea74850ec674e6d0a490cdba7dcbb264bb5c512af3b212f166  00-initramfs-extra-base.files
+0e1a9e8964d69622699f2aa37da0a1b2e8203bfd3d442e6f6b672daf917692b07903765b43d47f1708e05c7d31b637a2a9a3c8315f987df0870da0b5af53a4d8  00-initramfs-extra-base.files
 966284e8ef8f840258a84019db4a6ddd436cdc50193e0673532f70fef86a6e4c1bfd21b682f3708251b6b670ca569c90016926d0926babc5a0257bb33ae55d79  init.sh
 bbfbec0690386e81d1a43420e7898a1e32fdf10eab88dc8d1d500a5def84c60a6dbb7055f66dc163429faf46d540dd4e8e44642b27743ea783eed6b41e0ff019  init_functions.sh
 18a0ca97bca094aeb8cb1c2582205ac0aff131085c39f1715246541cacfb35434aba515cd5d338703843efb36b9effd494a51361c51fb39be6052ad866346d3d  init_2nd.sh