init: Enable sched_yield() compatability mode on boot.

In CFS, the (somewhat undefined) behavior of sched_yield() changed.

    See: http://kerneltrap.org/Linux/CFS_and_sched_yield

    This change enables 'compat' mode for sched_yield()

Signed-off-by: San Mehat <san@google.com>

rootdir/init.rc

@@ -33,6 +33,7 @@ loglevel 3
     write /proc/cpu/alignment 4
     write /proc/sys/kernel/sched_latency_ns 10000000
     write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000
+    write /proc/sys/kernel/sched_compat_yield 1
 
 # Create cgroup mount points for process groups
     mkdir /dev/cpuctl