servo: Merge #2703 - Add Fira Sans and DejaVu Sans to the last-resort font families (from nical:last_resort_font)

Source-Repo: https://github.com/servo/servo
Source-Revision: 239e72b0ce8fa31fd5e540b8b55e9675357a58dd

servo/src/components/gfx/platform/linux/font_list.rs

@@ -132,7 +132,11 @@ impl FontListHandle {
     }
 
     pub fn get_last_resort_font_families() -> Vec<String> {
-        vec!("Arial".to_string())
+        vec!(
+            "Fira Sans".to_string(),
+            "DejaVu Sans".to_string(),
+            "Arial".to_string()
+        )
     }
 }