tentative fix for test failing when in submodule

gcontini

2020-05-16 e16a991667d8e5c49cafb869d4844b80fc323ed8

 src/library/hw_identifier/ethernet.hpp

@@ -19,7 +19,7 @@
public:
   Ethernet(bool use_ip);
   virtual ~Ethernet();
   virtual LCC_API_IDENTIFICATION_STRATEGY identification_strategy() const;
   virtual LCC_API_HW_IDENTIFICATION_STRATEGY identification_strategy() const;
   virtual std::vector<HwIdentifier> alternative_ids() const;
};