Don't remove the symbol_visibility_hidden config in asan builds. We remove symbol_visibility_hidden to get better stack traces in debug builds but it causes ASAN issues with multiply instantiated globals. BUG=angleproject:3507 Change-Id: I8ec664bf7d9506cc45afb6f864de7b7ba7cbe99b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648275 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>