mac build provokes warnings

[lunarpapillo]

A macOS build works correctly, but provokes warnings that look like they could be improved. All of the warnings are instances of one of these three:

% cmake -H. -Bbuild -DFOSSILIZE_VULKAN_LAYER=OFF -DFOSSILIZE_TESTS=OFF -DCMAKE_INSTALL_PREFIX=/Volumes/smb_share/ci-build-resources/mac/fossilize
...
% cmake --build build --target install
...
/Users/lunarg/.jenkins/workspace/update-fossilize/label/Mac/Fossilize/fossilize.cpp:114:2: warning: 'sprintf' is deprecated: This function is provided for compatibility reasons only.  Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use snprintf(3) instead. [-Wdeprecated-declarations]
        sprintf(str, "%016" PRIx64, value);
        ^
... 
/Users/lunarg/.jenkins/workspace/update-fossilize/label/Mac/Fossilize/fossilize.cpp:63:20: warning: unused function 'operator!=' [-Wunused-function]
static inline bool operator!=(const VkShaderModuleIdentifierEXT &a, const VkShaderModuleIdentifierEXT &b)
                   ^
... 
/Users/lunarg/.jenkins/workspace/update-fossilize/label/Mac/Fossilize/path.cpp:147:21: warning: unqualified call to 'std::move' [-Wunqualified-std-cast-call]
                        result.push_back(move(i));
                                         ^
                                         std::