ncurses 5.7 - patch 20090103

ncurses 5.7 - patch 20090103

+ add a configure-time check to pick a suitable value for
  CC_SHARED_OPTS for Solaris (report by Dagobert Michelsen).
+ add configure --with-pkg-config and --enable-pc-files options, along
  with misc/gen-pkgconfig.in which can be used to generate ".pc" files
  for pkg-config (request by Jan Engelhardt).
+ use $includedir symbol in misc/ncurses-config.in, add --includedir
  option.
+ change makefiles to use $ARFLAGS rather than $AR_OPTS, provide a
  configure check to detect whether a "-" is needed before "ar"
  options.
+ update config.guess, config.sub from
	http://savannah.gnu.org/projects/config