libhsakmt: fix resource count in memory export

D3DKMTShareObjects() need resource count paramenter not the allocations count.
There is only one resource no matter how many allocations for a buffer.

Reviewed-by: Longlong Yao <Longlong.Yao@amd.com>
Signed-off-by: tiancyin <tianci.yin@amd.com>

wddm/gpu_memory.cpp

@@ -406,7 +406,7 @@ ErrorCode GpuMemory::ExportPhysicalHandle(int* dmabuf_fd, uint32_t flags) {
   }
 
   if (IsShared())
-    return d3dthunk::ShareObjects(num_allocations_, resource_, flags, dmabuf_fd);
+    return d3dthunk::ShareObjects(1, resource_, flags, dmabuf_fd);
   else
     return ErrorCode::UnSupported;
 }