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, 1 deletions

diff --git a/src/pacman/callback.c b/src/pacman/callback.c
index 83939509..b19e645a 100644
--- a/src/pacman/callback.c
+++ b/src/pacman/callback.c
@@ -189,7 +189,8 @@ void cb_event(alpm_event_t *event)
 				alpm_event_hook_run_t *e = &event->hook_run;
 				int digits = number_length(e->total);
 				printf("(%*zu/%*zu) %s\n", digits, e->position,
-						digits, e->total, e->name);
+						digits, e->total, 
+						e->desc ? e->desc : e->name);
 			}
 			break;
 		case ALPM_EVENT_CHECKDEPS_START: