chore(bower/publish): move DIST_TAG so that it gets the correct value

In the position that DIST_TAG was being assigned it was trying to get the
`distTag` value from the wrong (i.e. a bower-...) repository.

scripts/bower/publish.sh

@@ -29,6 +29,8 @@ function init {
     angular-touch
     angular-messages
   )
+  # get the npm dist-tag from a custom property (distTag) in package.json
+  DIST_TAG=$(readJsonProp "package.json" "distTag")
 }
 
 
@@ -110,8 +112,6 @@ function publish {
 
     # don't publish every build to npm
     if [ "${NEW_VERSION/+sha}" = "$NEW_VERSION" ] ; then
-      # get the npm dist-tag from a custom property (distTag) in package.json
-      DIST_TAG=$(readJsonProp "package.json" "distTag")
       echo "-- Publishing to npm as $DIST_TAG"
       npm publish --tag=$DIST_TAG
     fi