build: add a version requirement for vulkan pkg-config check

`vkGetPhysicalDeviceProperties2KHR` was added in Vulkan 1.0.39,
but 1.0.61 from Ubuntu Xenial (16.04) was the lowest anyone tried
to build mpv with as of late, so we are marking that as the minimum
required version.

This fixes issues arising during build time from having too old
version of vulkan available on a system, instead of causing a failure
to build.

1 files changed, 2 insertions, 1 deletions

diff --git a/wscript b/wscript
index 984fa8d083..db49f2f75b 100644
--- a/wscript
+++ b/wscript
@@ -807,7 +807,8 @@ video_output_features = [
     }, {
         'name': '--vulkan',
         'desc':  'Vulkan context support',
-        'func': check_pkg_config('vulkan'),
+        # Lowest version tested, Ubuntu 16.04's
+        'func': check_pkg_config('vulkan >= 1.0.61'),
     }, {
         'name': 'egl-helpers',
         'desc': 'EGL helper functions',