etcd: update to 3.0.15.

srcpkgs/etcd/template

@@ -1,6 +1,6 @@
 # Template file for 'etcd'
 pkgname=etcd
-version=3.0.13
+version=3.0.15
 revision=1
 build_style=go
 short_desc="Distributed reliable key-value store"
@@ -10,11 +10,15 @@ hostmakedepends="git"
 go_import_path="github.com/coreos/etcd"
 homepage="https://coreos.com/etcd/docs/latest/"
 distfiles="https://${go_import_path}/archive/v${version}.tar.gz"
-checksum=777d2dff3eb95410feb6ac411b538bed59cb94041fad7f4059827e952ea621c0
+checksum=c21871f7e1454b1698ff29601a296f4b09365fac25bea45c0af21542d486c307
 conf_files="/etc/sv/etcd/conf"
 system_accounts="etcd"
 make_dirs="/var/lib/etcd 0755 etcd etcd"
 
+pre_build() {
+	sed -i '/SupportPackageIsVersion3/d' etcdserver/etcdserverpb/rpc.pb.go
+}
+
 post_build() {
 	go get -x ${go_import_path}/etcdctl
 }