ncurses 5.7 - patch 20100515

ncurses 5.7 - patch 20100515

+ add configure option --enable-pthreads-eintr to control whether the
  new EINTR feature is enabled.
+ modify logic in pthread configuration to allow EINTR to interrupt
  a read operation in wgetch() (Novell #540571, patch by Werner Fink).
+ drop mkdirs.sh, use "mkdir -p".
+ add configure option --disable-libtool-version, to use the
  "-version-number" feature which was added in libtool 1.5 (report by
  Peter Haering).  The default value for the option uses the newer
  feature, which makes libraries generated using libtool compatible
  with the standard builds of ncurses.
+ updated test/configure to match configure script macros.
+ fixes for configure script from lynx changes:
  + improve CF_FIND_LINKAGE logic for the case where a function is
    found in predefined libraries.
  + revert part of change to CF_HEADER (cf: 20100424)