Add $VULKAN_SDK/$Lib to lib_dirs on windows

Change-Id: Ibdef291103ae6de081ee01789357d4ea7a6fe5ed
Reviewed-on: https://skia-review.googlesource.com/9907
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed