temp/81voltd: new aport (MR 5387)

Add version 1.0.0 of 81voltd [1].

This is based on discussions at [2]. 81voltd gets VoLTE working on
some SDM845 based devices. I tested this on my Pixel 3a and it works
with Optus but not Telstra (a more complicated VoLTE network).

I'm putting this for pmOS temp as hopefully the long term solution is to
upstream this to ModemManager. For now though this gets things working.

1: https://gitlab.com/flamingradian/81voltd/
2: https://gitlab.com/postmarketOS/pmaports/-/issues/1878#note_1826692945

Signed-off-by: Alistair Francis <alistair@alistair23.me>

temp/81voltd/81voltd.initd

@@ -0,0 +1,13 @@
+#!/sbin/openrc-run
+name="81voltd"
+description="Server-side implementation of the QMI IMS Data service"
+
+command="/usr/bin/81voltd"
+command_args=""
+command_background=true
+
+pidfile="/run/${RC_SVCNAME}.pid"
+
+depend() {
+	need modemmanager
+}

temp/81voltd/APKBUILD

@@ -0,0 +1,37 @@
+pkgname=81voltd
+pkgver=1.0.0
+pkgrel=0
+pkgdesc="Server-side implementation of the QMI IMS Data service"
+url="https://gitlab.com/flamingradian/81voltd"
+arch="all"
+license="GPL-2.0-or-later"
+makedepends="
+	modemmanager-dev
+	qrtr-dev
+	meson
+	"
+source="
+	$pkgname-$pkgver.tar.gz::https://gitlab.com/flamingradian/$pkgname/-/archive/v$pkgver/$pkgname-v$pkgver.tar.gz
+	81voltd.initd
+	"
+builddir="$srcdir/$pkgname-v$pkgver"
+
+# There are no checks to run
+options="!check"
+
+build() {
+        abuild-meson . output
+        meson compile -C output
+}
+
+package() {
+	DESTDIR="$pkgdir" meson install --no-rebuild -C output
+
+	install -Dm755 "$builddir"/output/81voltd "$pkgdir"/usr/bin/81voltd
+        install -Dm755 "$srcdir"/81voltd.initd "$pkgdir"/etc/init.d/81voltd
+}
+
+sha512sums="
+460ad150d7f43303147d22d4552ee5fc90a6ba0cda5606d29e55939de1df465f713272cfa009ab1d606fd6b140ffdb9f080f2356713cd24e7c8b3040031013fc  81voltd-1.0.0.tar.gz
+73fa6f27259f3731a811216983911886e4ce5fb15664f978e99184ab88fd4444142f72b6313474e59260596a54e8e3ace7b66f10ead92159fad930b3a225b464  81voltd.initd
+"