aports: GNSS via forked Alpine libqmi + modemmanager

libqmi: the upstream-merged (!470, in no release yet) LOC Register Events
client-identification TLVs, taken verbatim from upstream main (532de37e).
modemmanager: the AFW engine unlock + Position Report derivation (!1463,
still draft upstream, review-hardened and verified on device). Both as
patches on Alpine's git-snapshot aports, pkgrel=100.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

aports/temp/modemmanager/modemmanager.initd

@@ -0,0 +1,12 @@
+#!/sbin/openrc-run
+
+supervisor=supervise-daemon
+command=/usr/sbin/ModemManager
+command_args="${modemmanager_opts}"
+
+description="ModemManager Daemon"
+
+depend() {
+   need dbus
+   need polkit
+}