busybox: install ntpd service for busybox-huge.

Tests were failing due to underspecified checkdepends; added
the missing ones. Some still fail on glibc.

Closes: #28663 [via git-merge-pr]

srcpkgs/busybox/template

@@ -1,9 +1,9 @@
 # Template file for 'busybox'
 pkgname=busybox
 version=1.31.1
-revision=5
+revision=6
 hostmakedepends="perl"
-checkdepends="zip"
+checkdepends="tar which zip"
 short_desc="Swiss Army Knife of Embedded Linux"
 maintainer="Cameron Nemo <cnemo@tutanota.com>"
 license="GPL-2.0-only"
@@ -125,6 +125,7 @@ busybox-huge_package() {
 	pkg_install() {
 		vbin busybox-huge/busybox_unstripped busybox
 		vman busybox-huge/docs/busybox.1
+		vsv busybox-ntpd
 		vsv busybox-syslogd
 		vsv busybox-klogd
 	}