tilapia: emulate sdcard using 4 threads

This overrides the default of 2 threads.

Change-Id: I8693043c1f1dce27c6606aab31f57176d870a759
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/init.tilapia.rc b/init.tilapia.rc
index 0048f5d..2a48c3f 100644
--- a/init.tilapia.rc
+++ b/init.tilapia.rc
@@ -403,7 +403,7 @@
 #Sensor load calibration files end
 
 # virtual sdcard daemon running as media_rw (1023)
-service sdcard /system/bin/sdcard -u 1023 -g 1023 -l /data/media /mnt/shell/emulated
+service sdcard /system/bin/sdcard -u 1023 -g 1023 -t 4 -l /data/media /mnt/shell/emulated
     class late_start
 
 # bugreport is triggered by the VOLUME-DOWN and VOLUME-UP keys