[3.10] main/ncurses: fix automatic dependency due to symlinks

The -libs subpackage depended on ncurses-terminfo when it shouldn't because when moving $pkgdir/usr/lib also moved /usr/lib/terminfo which is a symlink to /usr/share/terminfo which is part of ncurses-terminfo and thus a dependency would be automatically added by the prepare_symlink() function from APKBUILD.