MEDIUM: mworker: add proc_list in global.h

Add the process list in types/global.h so it could be accessed from
anywhere.
diff --git a/include/types/global.h b/include/types/global.h
index 201a18a..66ae6da 100644
--- a/include/types/global.h
+++ b/include/types/global.h
@@ -234,6 +234,7 @@
 extern struct task *global_listener_queue_task;
 extern unsigned int warned;     /* bitfield of a few warnings to emit just once */
 extern volatile unsigned long sleeping_thread_mask;
+extern struct list proc_list; /* list of process in mworker mode */
 
 /* bit values to go with "warned" above */
 #define WARN_BLOCK_DEPRECATED       0x00000001