ncurses 5.9 - patch 20121006

ncurses 5.9 - patch 20121006

+ improve CF_GCC_VERSION to work around Debian's customization of gcc
  --version message.
+ improve configure macros as done in byacc:
  + drop 2.13 compatibility; use 2.52.xxxx version only since EMX port
    has used that for a while.
  + add 3rd parameter to AC_DEFINE's to allow autoheader to run, i.e.,
    for experimental use.
  + remove unused configure macros.
+ modify configure script and makefiles to quiet new autoconf warning
  for LIBS_TO_MAKE variable.
+ modify configure script to show $PATH_SEPARATOR variable.
+ update config.guess, config.sub