add /d/sync to dumpstate

Change-Id: I24f8f3e0420c2198ae3981fc067fb660898655e8
diff --git a/cmds/dumpstate/dumpstate.c b/cmds/dumpstate/dumpstate.c
index 218ff07..4bb05c4 100644
--- a/cmds/dumpstate/dumpstate.c
+++ b/cmds/dumpstate/dumpstate.c
@@ -90,6 +90,7 @@
     dump_file("KERNEL WAKELOCKS", "/proc/wakelocks");
     dump_file("KERNEL WAKE SOURCES", "/d/wakeup_sources");
     dump_file("KERNEL CPUFREQ", "/sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state");
+    dump_file("KERNEL SYNC", "/d/sync");
 
     run_command("PROCESSES", 10, "ps", "-P", NULL);
     run_command("PROCESSES AND THREADS", 10, "ps", "-t", "-p", "-P", NULL);