ncurses 6.0 - patch 20180120

ncurses 6.0 - patch 20180120

+ build-fix in picsmap.c for stdint.h existence.
+ add --disable-stripping option to configure scripts.
+ modify ncurses-examples to install test-scripts in the data directory.
+ work around tool-breakage in Debian 9 and later by invoking
  gprconfig to specify the C compiler to be used by gnatmake,
  and conditionally suppressing Library_Options line for static
  libraries.
+ bump the compat level for test-packages to 7, i.e., Debian 5.