main/procps: deduplicate pgrep and pkill

main/procps/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=procps
 pkgver=3.3.12
-pkgrel=0
+pkgrel=1
 pkgdesc="Utilities for monitoring your system and processes on your system"
 url="https://gitlab.com/procps-ng/procps"
 arch="all"
@@ -50,6 +50,9 @@ package() {
 	make DESTDIR="$pkgdir" ldconfig=true install="install -D" \
 		install || return 1
 
+	# These binaries are identical.
+	ln -sf pgrep "$pkgdir"/bin/pkill || return 1
+
 	install -d "$pkgdir"/usr/lib
 	mv "$pkgdir"/include "$pkgdir"/usr/ \
 		&& mv "$pkgdir"/lib/pkgconfig "$pkgdir"/usr/lib/