Bug 85 : Add Makefile to build charms

Signed-off-by: Philip Joseph <philip.joseph@riftio.com>

Makefile

+#
+#   Copyright 2016 RIFT.io Inc
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+#
+
+BUILD_DIR = .
+
+CHARMS:= vpe-router vyos-proxy
+CHARM_SRC_DIR := layers
+CHARM_BUILD_DIR := $(BUILD_DIR)/builds
+
+CHARM_SRC_DIRS := $(addprefix $(CHARM_SRC_DIR)/, $(CHARMS))
+CHARM_BUILD_DIRS := $(addprefix $(CHARM_BUILD_DIR)/, $(CHARMS))
+
+all: $(CHARM_BUILD_DIRS)
+
+clean:
+	-@ $(RM) -rf $(CHARM_BUILD_DIR)
+
+$(CHARM_BUILD_DIR)/%: $(CHARM_SRC_DIR)/%
+	charm-build -o $(BUILD_DIR) $<
+

layers/vyos-proxy/layer.yaml

@@ -10,3 +10,4 @@
 "includes":
 - "layer:basic"
 "is": "vyos-proxy"
+"repo": "https://osm.etsi.org/gerrit/osm/juju-charms"