grouper: emulate sdcard using 4 threads

This overrides the default of 2 threads.

Change-Id: Ie15b6a02499c5f9f25766c537d1b5a39d312a608
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/init.grouper.rc b/init.grouper.rc
index 1cae2bd..b4df6a6 100644
--- a/init.grouper.rc
+++ b/init.grouper.rc
@@ -383,7 +383,7 @@
 #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