Write hostapd pid to a file
am: fa798f237b

Change-Id: I3a8c1574be6a905a91c84ff7272b75dd2929e8a6
diff --git a/hostapd/hostapd.android.rc b/hostapd/hostapd.android.rc
index 1f5cbd0..83e8d87 100644
--- a/hostapd/hostapd.android.rc
+++ b/hostapd/hostapd.android.rc
@@ -14,6 +14,7 @@
         /data/misc/wifi/hostapd.conf
     class main
     user wifi
+    writepid /data/misc/wifi/hostapd.pid
     group wifi
     disabled
     oneshot