speedup wifi boot (#597)

* speedup wifi boot

* just a pre

* bump kernel:

* bump kernel

userspace/root/usr/comma/wlan-nm-init.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -e
+
+PATH=/usr/sbin:/usr/bin:/sbin:/bin
+
+iface=wlan0
+timeout=300
+
+for ((i = 0; i < timeout; i++)); do
+  [[ -r "/sys/class/net/$iface/ifindex" ]] && break
+  sleep 0.1
+done
+
+if [[ ! -r "/sys/class/net/$iface/ifindex" ]]; then
+  echo "timed out waiting for $iface"
+  exit 0
+fi
+
+ifindex=$(< "/sys/class/net/$iface/ifindex")
+mkdir -p /run/udev/data
+tmp=$(mktemp "/run/udev/data/n${ifindex}.XXXXXX")
+
+{
+  printf 'I:%s\n' "$(($(date +%s%N) / 1000))"
+  printf 'E:NM_UNMANAGED=0\n'
+  printf 'V:1\n'
+} > "$tmp"
+
+mv "$tmp" "/run/udev/data/n${ifindex}"

userspace/root/usr/lib/systemd/system/NetworkManager.service.d/wlan-prestart.conf

@@ -0,0 +1,2 @@
+[Service]
+ExecStartPre=/usr/comma/wlan-nm-init.sh