Although most libfprint tests are vert quick, several of the VirtualImage
ones come very close to the default time-out threshold of 30 seconds.
Increase the relevant threshold to 45 seconds to make those tests less
sensitive to CPU frequency, system load etc.

--- a/tests/meson.build
+++ b/tests/meson.build
@@ -88,6 +88,7 @@
                     suite: ut_suite,
                     depends: libfprint_typelib,
                     env: envs,
+                    timeout: 45,
                 )
             endforeach
         else