Fix amazon_s3_hooks.rb
Fix amazon_s3_hooks.rb

Javascript file is searching in the redmine_s3 directory instead of amazon_s3.
According to the documentation the plugin should be installed in amazon_s3 directory so plugin_assets are compiled to the specified directory.
x3ro/redmine_amazon_s3,x3ro/redmine_amazon_s3,x3ro/redmine_amazon_s3