wsl/hsakmt: clean up namespace

Signed-off-by: Longlong Yao <Longlong.Yao@amd.com>
Reviewed-by: lyndonli <Lyndon.Li@amd.com>
Reviewed-by: Flora Cui <flora.cui@amd.com>
Part-of: <http://10.67.69.192/wsl/libhsakmt/-/merge_requests/7>

util/small_heap.cpp

@@ -42,7 +42,7 @@
 
 #include "small_heap.h"
 
-namespace rocr {
+namespace wsl {
 
 // Inserts node into freelist after place.
 // Assumes node will not be an end of the list (list has guard nodes).
@@ -182,4 +182,4 @@ void* SmallHeap::alloc_high(size_t bytes) {
   return nullptr;
 }
 
-}  // namespace rocr
+} // namespace wsl