util: Fix race condition on libgcrypt initialization

util: Fix race condition on libgcrypt initialization

Fixes intermittent Vulkan CTS failures within the test groups:
dEQP-VK.api.object_management.multithreaded_per_thread_device
dEQP-VK.api.object_management.multithreaded_per_thread_resources
dEQP-VK.api.object_management.multithreaded_shared_resources

Signed-off-by: Mark Janes <mark.a.janes@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94904

Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>