[vte] build: Increase test timeout

[Christian Persch <chpe src gnome org>]

commit e6ac72a2f7f67d508cd2fcf863764dc593636850
Author: Christian Persch <chpe src gnome org>
Date:   Fri Apr 26 16:49:28 2019 +0200

    build: Increase test timeout
    
    It appears there are computers even slower than mine out there!
    
    https://gitlab.gnome.org/GNOME/vte/issues/120

 src/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/meson.build b/src/meson.build
index 5ebc9231..4dc6a86b 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -426,6 +426,7 @@ foreach test: test_units
     test[0],
     test[1],
     env: test_env,
+    timeout: 600, # See issue vte#120
   )
 endforeach