libmpack: use mingw-w64-libtool instead of libtool
libmpack: use mingw-w64-libtool instead of libtool

For some reason libtool was naming the dll msys-foo rather than libfoo.

Also, remove spurious 'lua' from pkgbase

lhmouse/MINGW-packages,stahta01/MINGW-packages,oroppas/MINGW-packages,Ede123/MINGW-packages,jtanx/MINGW-packages,Optiligence/MINGW-packages,stahta01/MINGW-packages,JPeterMugaas/MINGW-packages,oroppas/MINGW-packages,stahta01/MINGW-packages,lhmouse/MINGW-packages,lhmouse/MINGW-packages,oscarfv/MINGW-packages,stahta01/MINGW-packages,jtanx/MINGW-packages,jtanx/MINGW-packages,stahta01/MINGW-packages,oroppas/MINGW-packages,Chocobo1/MINGW-packages,oroppas/MINGW-packages,fabiangreffrath/MINGW-packages,oscarfv/MINGW-packages,Alexpux/MINGW-packages,fabiangreffrath/MINGW-packages,lhmouse/MINGW-packages,JPeterMugaas/MINGW-packages,Optiligence/MINGW-packages,oroppas/MINGW-packages,fabiangreffrath/MINGW-packages,JPeterMugaas/MINGW-packages,Alexpux/MINGW-packages,InitialForce/MINGW-packages,Alexpux/MINGW-packages,oroppas/MINGW-packages,Ede123/MINGW-packages,Chocobo1/MINGW-packages,Alexpux/MINGW-packages,JPeterMugaas/MINGW-packages,fabiangreffrath/MINGW-packages,Optiligence/MINGW-packages,fabiangreffrath/MINGW-packages,lhmouse/MINGW-packages,oscarfv/MINGW-packages,jtanx/MINGW-packages,Ede123/MINGW-packages,Optiligence/MINGW-packages,Ede123/MINGW-packages,InitialForce/MINGW-packages,JPeterMugaas/MINGW-packages,stahta01/MINGW-packages,oscarfv/MINGW-packages,JPeterMugaas/MINGW-packages,lhmouse/MINGW-packages,oscarfv/MINGW-packages,InitialForce/MINGW-packages,Alexpux/MINGW-packages,Alexpux/MINGW-packages,Chocobo1/MINGW-packages,oscarfv/MINGW-packages,fabiangreffrath/MINGW-packages