Repository breadcrumbs and file header links should be dark

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/framework/files.scss

@@ -50,6 +50,10 @@
       }
     }
 
+    a {
+      color: $gl-dark-link-color;
+    }
+
     .left-options {
       margin-top: -3px;
     }

app/assets/stylesheets/pages/projects.scss

@@ -229,6 +229,10 @@
     padding: 0 3px;
     color: #999;
   }
+
+  a {
+    color: $gl-dark-link-color;
+  }
 }
 
 .last-push-widget {