[PATCH 3 of 3] makefile: add Ubuntu Bionic docker targets (.deb and ppa)

[Antonio Muci]

# HG changeset patch
# User Antonio Muci <a.mux at inwind.it>
# Date 1523713197 -7200
#      Sat Apr 14 15:39:57 2018 +0200
# Node ID b29e5ecc90eef3af76eaaa4c21b992da66b8e444
# Parent  b5874ec21df592d83c3f97aa12ea33dfdb03e839
makefile: add Ubuntu Bionic docker targets (.deb and ppa)

Bionic Beaver is an LTS release, supported until 2023-04.

diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -239,6 +239,12 @@ docker-ubuntu-artful: contrib/docker/ubu
 docker-ubuntu-artful-ppa: contrib/docker/ubuntu-artful
 	contrib/dockerdeb ubuntu artful --source-only
 
+docker-ubuntu-bionic: contrib/docker/ubuntu-bionic
+	contrib/dockerdeb ubuntu bionic
+
+docker-ubuntu-bionic-ppa: contrib/docker/ubuntu-bionic
+	contrib/dockerdeb ubuntu bionic --source-only
+
 fedora20:
 	mkdir -p packages/fedora20
 	contrib/buildrpm
@@ -308,6 +314,7 @@ linux-wheels-i686:
 	docker-ubuntu-trusty docker-ubuntu-trusty-ppa \
 	docker-ubuntu-xenial docker-ubuntu-xenial-ppa \
 	docker-ubuntu-artful docker-ubuntu-artful-ppa \
+	docker-ubuntu-bionic docker-ubuntu-bionic-ppa \
 	fedora20 docker-fedora20 \
 	fedora21 docker-fedora21 \
 	centos5 docker-centos5 \