Look for configuration in /vulkan-loader-configuration directory

We're trying to deprecate config-data, so the Vulkan loader should look
for configuration data in the /vulkan-loader-configuration directory
instead. This matches the behavior speced in RFC-0205.

Change-Id: Ic747399e7f8c15ea8ce2db07f86fc1a4bc9618e2
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/Vulkan-Loader/+/826256
Reviewed-by: John Rosasco <rosasco@google.com>
Commit-Queue: John Bauman <jbauman@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 8b60426..d666124 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -54,7 +54,7 @@
   }
   if (is_fuchsia) {
     defines += [
-      "SYSCONFDIR=\"/config/data\"",
+      "SYSCONFDIR=\"/vulkan-loader-configuration\"",
       "EXTRASYSCONFDIR=\"/pkg/data\"",
     ]
   }