init: Bump up the max cpu bandwidth shares ratio for background.

  New ratio is 1024/16 (1.5625% for background when cpu is under load)

Signed-off-by: San Mehat <san@google.com>
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 2e00c71..3fe4c25 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -50,7 +50,7 @@
     mkdir /dev/cpuctl/bg_non_interactive
     chown system system /dev/cpuctl/bg_non_interactive/tasks
     chmod 0777 /dev/cpuctl/bg_non_interactive/tasks
-    write /dev/cpuctl/bg_non_interactive/cpu.shares 1
+    write /dev/cpuctl/bg_non_interactive/cpu.shares 16
 
 # mount mtd partitions
     # Mount /system rw first to give the filesystem a chance to save a checkpoint