Drush generate-makefile does not detect project when module name is different

When a module is enabled that's part of a bigger project e.g. fieldgroup in the cck project, or when the module has been badly named e.g. google_analytics has a googleanalytics.module file in it, then _drush_generate_makefile() skips over it. This is because of the check at around l50:

 foreach ($project_info as $item) {
   $name = $item->name;
   $type = $item->type;
   if ($item->info['project'] != 'drupal' && $item->info['project'] == $name) {

If the project isn't the same as the module name, nothing happens.

Please find attached a patch to fix this behaviour. This patch does as follows:

* Check if the project and module names are different: if so, mark this as a "subproject"
* Set the project name to be the actual project name
* Only get updatexml on full projects
* Only process the first subproject to extract its parent project data
* Only check the file location if this is a full project (it just gets confused for subprojects.)

This issue will also affect #894440: Enhance generate-makefile to include d.o project version numbers eventually, as it does a check based on $name, which should probably change to $project_name .