dumpstate: Add blocked process wait-channel info to bugreport

Fix for http://b/2630027

Change-Id: I3606d8bf95c58df2b290dbd13f48538d82f16088
Signed-off-by: San Mehat <san@google.com>
diff --git a/cmds/dumpstate/dumpstate.c b/cmds/dumpstate/dumpstate.c
index e8b5eaf..082e704 100644
--- a/cmds/dumpstate/dumpstate.c
+++ b/cmds/dumpstate/dumpstate.c
@@ -138,6 +138,8 @@
     dump_file("LAST PANIC CONSOLE", "/data/dontpanic/apanic_console");
     dump_file("LAST PANIC THREADS", "/data/dontpanic/apanic_threads");
 
+    for_each_pid(show_wchan, "BLOCKED PROCESS WAIT-CHANNELS");
+
     printf("------ BACKLIGHTS ------\n");
     printf("LCD brightness=");
     dump_file(NULL, "/sys/class/leds/lcd-backlight/brightness");
@@ -161,7 +163,6 @@
     run_command("DUMPSYS", 60, "dumpsys", NULL);
 }
 
-
 static void usage() {
     fprintf(stderr, "usage: dumpstate [-d] [-o file] [-s] [-z]\n"
             "  -d: append date to filename (requires -o)\n"