Move duplicated thread_enable_cancel to CommonLibs

Change-Id: I1a479b59bdda01233273dfa919bd678edbe34708
diff --git a/CommonLibs/Threads.cpp b/CommonLibs/Threads.cpp
index 2988e12..c056d69 100644
--- a/CommonLibs/Threads.cpp
+++ b/CommonLibs/Threads.cpp
@@ -122,6 +122,12 @@
 	}
 }
 
+void thread_enable_cancel(bool cancel)
+{
+	cancel ? pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) :
+		 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+}
+
 void Thread::start(void *(*task)(void*), void *arg)
 {
 	assert(mThread==((pthread_t)0));
diff --git a/CommonLibs/Threads.h b/CommonLibs/Threads.h
index 3b76985..4c5b9ee 100644
--- a/CommonLibs/Threads.h
+++ b/CommonLibs/Threads.h
@@ -142,6 +142,7 @@
 	thread.start((void *(*)(void*))function, (void*)argument);
 
 void set_selfthread_name(const char *name);
+void thread_enable_cancel(bool cancel);
 
 /** A C++ wrapper for pthread threads.  */
 class Thread {