Add "meta" attribute to return of POST /api/v1/media method as well (#3333)

app/views/api/v1/media/create.rabl

 object @media
 attribute :id, :type
-node(:url) { |media| full_asset_url(media.file.url(:original)) }
+
+node(:url)         { |media| full_asset_url(media.file.url(:original)) }
 node(:preview_url) { |media| full_asset_url(media.file.url(:small)) }
-node(:text_url) { |media| medium_url(media) }
+node(:text_url)    { |media| medium_url(media) }
+node(:meta)        { |media| media.file.meta }

app/views/api/v1/statuses/_media.rabl

@@ -3,4 +3,4 @@ attributes :id, :remote_url, :type
 node(:url)         { |media| full_asset_url(media.file.url(:original)) }
 node(:preview_url) { |media| full_asset_url(media.file.url(:small)) }
 node(:text_url)    { |media| media.local? ? medium_url(media) : nil }
-node(:meta)       { |media| media.file.meta }
\ No newline at end of file
+node(:meta)        { |media| media.file.meta }