vold: Give logwrapper the ability to put jobs into the background sched group.

   Also set disk check/format execution to background.

Signed-off-by: San Mehat <san@google.com>
diff --git a/vold/format.c b/vold/format.c
index 3383949..a1faf7a 100755
--- a/vold/format.c
+++ b/vold/format.c
@@ -44,7 +44,7 @@
         args[3] = "-O android";
         args[4] = devpath;
         args[5] = NULL;
-        rc = logwrap(5, args);
+        rc = logwrap(5, args, 1);
     } else {
         char *args[7];
         args[0] = MKE2FS_PATH;
@@ -54,7 +54,7 @@
         args[4] = "-v";
         args[5] = devpath;
         args[6] = NULL;
-        rc = logwrap(6, args);
+        rc = logwrap(6, args, 1);
     }
  
     free(devpath);