Appveyor: add explicit libtool dependency to try to make it work with 3.0 cygwin; print libtool location and version.
Appveyor: add explicit libtool dependency to try to make it work with 3.0 cygwin; print libtool location and version.

quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs