Do not allow default mem_flags

Force mem_flags to be explicit passed in then calling Queue constructor
to avoid ambiguity with calls to Queue constructor trying to only pass
the agent_node_id.

Change-Id: Ib6fedcb9e52d6c9f35f9051dfa989343456ca368
Signed-off-by: David Yat Sin <David.YatSin@amd.com>

runtime/hsa-runtime/core/inc/queue.h

@@ -184,7 +184,7 @@ class Queue : public Checked<0xFA3906A679F9DB49>, private LocalQueue {
     public_handle_ = Convert(this);
   }
 
-  Queue(int agent_node_id, int mem_flags = 0) : LocalQueue(agent_node_id, mem_flags), amd_queue_(queue()->amd_queue) {
+  Queue(int agent_node_id, int mem_flags) : LocalQueue(agent_node_id, mem_flags), amd_queue_(queue()->amd_queue) {
     queue()->core_queue = this;
     public_handle_ = Convert(this);
   }