Improve maintainability and Requires of pkg-config file slightly
Improve maintainability and Requires of pkg-config file slightly

upbit/libimobiledevice,kalev/libimobiledevice,libimobiledevice-win32/libimobiledevice,libimobiledevice/libimobiledevice,libimobiledevice-win32/libimobiledevice,Tatsh/libimobiledevice,Tatsh/libimobiledevice,kalev/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice-win32/libimobiledevice,libimobiledevice-win32/libimobiledevice,upbit/libimobiledevice,patweb/libimobiledevice,patweb/libimobiledevice,kalev/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice/libimobiledevice,patweb/libimobiledevice,upbit/libimobiledevice