[perf-web] Fix a typo

[Owen Taylor <otaylor src gnome org>]

commit 71e42cfa4f01d5a5bab4580bad40646c9f948aa6
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Tue Jul 22 21:54:25 2014 -0400

    Fix a typo
    
    unix_time not unix-time

 metrics/views.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/metrics/views.py b/metrics/views.py
index 88a54dd..c308667 100644
--- a/metrics/views.py
+++ b/metrics/views.py
@@ -219,7 +219,7 @@ def values(request):
                 last_target = target_name
 
             target_data['values'].append({
-                'time': unix-time(summary.time),
+                'time': unix_time(summary.time),
                 'avg': summary.avg_value,
                 'min': summary.min_value,
                 'max': summary.max_value,