Generate and archive fission cli per OS and platform (#2071)

* Generate and archive fission cli per OS and platform

* Separate tagging from release script

hack/release-tag.sh

@@ -0,0 +1,26 @@
+doit() {
+    echo "! $*"
+    "$@"
+}
+
+version=$1
+if [ -z $version ]; then
+    echo "Release version not mentioned"
+    exit 1
+fi
+
+gittag=$version
+prefix="v"
+gopkgtag=${version/#/${prefix}}
+
+if [[ ${version} == v* ]]; then # if version starts with "v", don't append prefix.
+    gopkgtag=${version}
+fi
+
+# tag the release
+doit git tag $gittag
+doit git tag -a $gopkgtag -m "Fission $gopkgtag"
+
+# push tag
+doit git push origin $gittag
+doit git push origin $gopkgtag