ncurses 6.1 - patch 20191228

ncurses 6.1 - patch 20191228

+ in gen-pkgconfig.in, move the RPATH_LIST and PRIVATE_LIBS assignments
  past the various prefix/libdir assignments, to allow for using those
  symbols, e.g., as done via CF_SHARED_OPTS.
+ improve ncurses*-config and pc-files by filtering out linker-specs.
+ modify test-package to more closely match Fedora's configuration
  for PIE/PIC feature and debug-packages.