main/gdbm: add -tools as dependency for -dev

I forgot about it in 67e32b82.

main/gdbm/APKBUILD

@@ -2,11 +2,12 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=gdbm
 pkgver=1.20
-pkgrel=1
+pkgrel=2
 pkgdesc="GNU dbm is a set of database routines that use extensible hashing"
 url="https://www.gnu.org/software/gdbm/"
 arch="all"
 license="GPL-3.0-or-later"
+depends_dev="$pkgname-tools=$pkgver-r$pkgrel"
 subpackages="$pkgname-dev $pkgname-doc $pkgname-tools"
 source="https://ftp.gnu.org/gnu/gdbm/gdbm-$pkgver.tar.gz"