This allows the TSAN/ASAN builds to properly locate the library.
Makes the fuchsia workaround apply everywhere.

Bug: chromium:1000668
Bug: angleproject:3876
Change-Id: Ide2e8527c89c614a648204e953def1f24b702a62
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/36468
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>