rootdir: init.rc: Bump up background cpu shares to 5.0%

Signed-off-by: San Mehat <san@google.com>
diff --git a/rootdir/init.rc b/rootdir/init.rc
index a648ad8..2bed980 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -51,7 +51,8 @@
     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 16
+    # 5.0 %
+    write /dev/cpuctl/bg_non_interactive/cpu.shares 52
 
 # mount mtd partitions
     # Mount /system rw first to give the filesystem a chance to save a checkpoint