Fix bug when a file_clash arise

In some cases creating a file would raise an exception, due to clashes
with existing file. E.g. creating a file where a directory with the same
name is present.

This fix rescue the exception and print a "file_clash" warning.

lib/thor/actions/empty_directory.rb

@@ -112,11 +112,18 @@ def invoke_with_conflict_check(&block)
         if exists?
           on_conflict_behavior(&block)
         else
-          say_status :create, :green
           yield unless pretend?
+          say_status :create, :green
         end
 
         destination
+      rescue SystemCallError => e
+        raise e unless %w(Errno::EISDIR Errno::EEXIST).include?(e.class.name)
+        on_file_clash_behavior
+      end
+
+      def on_file_clash_behavior
+        say_status :file_clash, :red
       end
 
       # What to do when the destination file already exists.