connman: dbus: Use non-deprecated installation path

Quoting from D-Bus 1.14.0 release notes:

> Third-party software should install default dbus policies for the system
>  bus into ${datadir}/dbus-1/system.d (this has been supported since dbus
> 1.10, released in August 2015). Installing default dbus policies in
>  ${sysconfdir}/dbus-1/system.d is now considered to be deprecated.

https://gitlab.freedesktop.org/dbus/dbus/-/blob/dbus-1.14.0/NEWS#L45-51

packages/network/connman/package.mk

@@ -40,7 +40,7 @@ PKG_CONFIGURE_OPTS_TARGET="--srcdir=.. \
                            --disable-stats \
                            --enable-client \
                            --enable-datafiles \
-                           --with-dbusconfdir=/etc \
+                           --with-dbusconfdir=/usr/share \
                            --with-systemdunitdir=/usr/lib/systemd/system \
                            --disable-silent-rules \
                            --disable-wifi \