system/ncurses: Add dependency for cross-build

The bootstrap environment needs `tic` available to create the terminfo
database for the target environment.

system/ncurses/APKBUILD

@@ -9,6 +9,7 @@ arch="all"
 options="!check"  # "tests" are actual demo programs, not a test suite.
 license="MIT"
 depends=""
+makedepends_build="ncurses"
 subpackages="$pkgname-static $pkgname-dev $pkgname-doc $pkgname-libs
 	$pkgname-terminfo-base:base:noarch $pkgname-terminfo:terminfo:noarch"
 source="https://invisible-mirror.net/archives/ncurses/current/$pkgname-$pkgver-$_ver.tgz"