main/alpine-base: release 2.1.0_rc2

fixes #418

main/alpine-base/APKBUILD

 # Contributor: Natanael Copa <ncopa@alpinelinux.org>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=alpine-base
-pkgver=2.0
-pkgrel=3
+pkgver=2.1.0_rc2
+pkgrel=0
 pkgdesc="Meta package for minimal alpine base"
 url="http://alpinelinux.org"
 license="GPL"
@@ -16,7 +16,12 @@ source="http://dev.alpinelinux.org/~ncopa/alpine/alpine-devel@lists.alpinelinux.
 	"
 
 build() {
+	return 0
+}
+
+package() {
 	mkdir -p "$pkgdir"/etc/apk/keys
 	install -m644 "$srcdir"/*.pub "$pkgdir"/etc/apk/keys/
+	echo $pkgver > "$pkgdir"/etc/alpine-release
 }
 md5sums="75ee19ea2b03c12bc171647edc677f6f  alpine-devel@lists.alpinelinux.org-4a6a0840.rsa.pub"