ncurses 6.0 - patch 20150711

ncurses 6.0 - patch 20150711

+ modify scripts to build/use test-packages for the pthreads
  configuration of ncurses6.
+ add references to ttytype and termcap symbols in demo_terminfo.c and
  demo_termcap.c to ensure that when building ncursest.map, etc., that
  the corresponding names such as _nc_ttytype are added to the list of
  versioned symbols (report by Werner Fink)
+ fix regression from 20150704 (report/patch by Werner Fink).