ncurses 5.9 - patch 20121222

ncurses 5.9 - patch 20121222

+ add *.dSYM directories to clean-rule in ncurses directory makefile,
  for Mac OS builds.
+ add a configure check for gcc option -no-cpp-precomp, which is not
  available in all Mac OS X configurations (report by Andras Salamon,
  cf: 20011208).
+ improve 20021221 workaround for broken acs, handling a case where
  that ACS_xxx character is not in the acsc string but there is a known
  wide-character which can be used.