shiny/driver: only load Windows DLLs from the System32 directory

See issue golang/go#14959 for details.

Change-Id: I7c06b23b5cb98e4330fb85c025cad2cbd3db37ae
Reviewed-on: https://go-review.googlesource.com/23025
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2 files changed