Start charger at /system/bin/charger.

Bug: 114042635
Test: Boot into recovery mode on walleye. Check that charger keeps
      working.
Change-Id: I818536a6d261c860dd6f6c08774c2355e14f4236
diff --git a/etc/init.rc b/etc/init.rc
index fa8fe26..0822aba 100644
--- a/etc/init.rc
+++ b/etc/init.rc
@@ -73,7 +73,7 @@
     critical
     seclabel u:r:ueventd:s0
 
-service charger /charger -r
+service charger /system/bin/charger
     critical
     seclabel u:r:charger:s0