docker: support Fedora 21

Makefile

@@ -155,6 +155,17 b' docker-fedora20:'
 	mkdir -p packages/fedora20
 	contrib/dockerrpm fedora20
 
+fedora21:
+	mkdir -p packages/fedora21
+	contrib/buildrpm
+	cp rpmbuild/RPMS/*/* packages/fedora21
+	cp rpmbuild/SRPMS/* packages/fedora21
+	rm -rf rpmbuild
+
+docker-fedora21:
+	mkdir -p packages/fedora21
+	contrib/dockerrpm fedora21
+
 centos5:
 	mkdir -p packages/centos5
 	contrib/buildrpm --withpython
@@ -188,5 +199,5 b' docker-centos7:'
 .PHONY: help all local build doc clean install install-bin install-doc \
 	install-home install-home-bin install-home-doc \
 	dist dist-notests check tests check-code update-pot \
-	osx fedora20 docker-fedora20 \
+	osx fedora20 docker-fedora20 fedora21 docker-fedora21 \
 	centos5 docker-centos5 centos6 docker-centos6 centos7 docker-centos7

contrib/docker/fedora21

@@ -1,4 +1,4 b''
-FROM fedora:20
+FROM fedora:21
 RUN yum install -y gcc
 RUN yum install -y python-devel python-docutils
 RUN yum install -y make