Add include/config to vulkan memory allocator build.

Bug: skia:
Change-Id: Ic5e35c6d89203fcad734349afc421e84388997fb
Reviewed-on: https://skia-review.googlesource.com/135322
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/third_party/vulkanmemoryallocator/BUILD.gn b/third_party/vulkanmemoryallocator/BUILD.gn
index 796330e..e15ea0c 100644
--- a/third_party/vulkanmemoryallocator/BUILD.gn
+++ b/third_party/vulkanmemoryallocator/BUILD.gn
@@ -13,6 +13,7 @@
   # Need to add this so when we include GrVkDefines.h it internally can find SkTypes.h which is
   # needed in case the user set defines in SkUserConfig.h.
   include_dirs = [ "../../include/core" ]
+  include_dirs += [ "../../include/config" ]
   if (defined(is_skia_standalone) && is_skia_standalone && !is_official_build) {
     include_dirs += [ "../../tools/gpu/vk" ]
     include_dirs += [ "../../include/config" ]