Add HSA_CU_MASK

New environment variable HSA_CU_MASK allows users to
specify a cu mask to every queue allocated from any
GPU.  hsa_amd_queue_cu_set_mask is restricted from
escaping this mask.

A new API hsa_amd_queue_cu_get_mask is added to query
the current cu mask.

Change-Id: I846c03a5faaca9b95067c31db84b59cc9fce2f03


[ROCm/ROCR-Runtime commit: 4455250be1]

projects/rocr-runtime/runtime/hsa-runtime/inc/hsa_api_trace.h

@@ -186,6 +186,7 @@ struct AmdExtTable {
   decltype(hsa_amd_svm_attributes_set)* hsa_amd_svm_attributes_set_fn;
   decltype(hsa_amd_svm_attributes_get)* hsa_amd_svm_attributes_get_fn;
   decltype(hsa_amd_svm_prefetch_async)* hsa_amd_svm_prefetch_async_fn;
+  decltype(hsa_amd_queue_cu_get_mask)* hsa_amd_queue_cu_get_mask_fn;
 };
 
 // Table to export HSA Core Runtime Apis