add configure.ac as a dependency of the yubico-piv-tool binary
add configure.ac as a dependency of the yubico-piv-tool binary

since if version number changes it should be rebuilt
relates #53

akgood/yubico-piv-tool,Yubico/yubico-piv-tool,akgood/yubico-piv-tool,akgood/yubico-piv-tool,Yubico/yubico-piv-tool,Yubico/yubico-piv-tool,akgood/yubico-piv-tool