Add AC_PROG_LIBTOOL because we use LIBTOOL macros.
Add AC_PROG_LIBTOOL because we use LIBTOOL macros.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb