Correctly refer to libpthread_LIBS
Correctly refer to libpthread_LIBS

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