alpm-hooks: add Description field

The "Description" field allows a hook to provide a some text for frontends
to use in describing what the hook is doing.  For example:

Description = updating info page directory

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 337104e0..fba25ab8 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -568,6 +568,8 @@ typedef struct _alpm_event_hook_run_t {
 	alpm_event_type_t type;
 	/** Name of hook */
 	const char *name;
+	/** Description of hook to be outputted */
+	const char *desc;
 	/** position of hook being run */
 	size_t position;
 	/** total hooks being run */