Added -q flag to showmap.

dumpstate calls showmap for each pid, and since most of them are empty,
it ends up polluting logcat with entries like:

03-17 14:49:05.974 12160 12160 E dumpstate: command '/system/xbin/su
root showmap -q 9867' failed: No such file or directory

BUG: 26906985
Change-Id: I7e064b2ec8901b6ccee49b228be96ff2847c703c
diff --git a/cmds/dumpstate/utils.cpp b/cmds/dumpstate/utils.cpp
index f0feb8e..d21ef7b 100644
--- a/cmds/dumpstate/utils.cpp
+++ b/cmds/dumpstate/utils.cpp
@@ -394,7 +394,7 @@
 
     sprintf(title, "SHOW MAP %d (%s)", pid, name);
     sprintf(arg, "%d", pid);
-    run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL);
+    run_command(title, 10, SU_PATH, "root", "showmap", "-q", arg, NULL);
 }
 
 static int _dump_file_from_fd(const char *title, const char *path, int fd) {