Fuchsia SDK: Also copy zlib to the SDK's bin directory.
Fuchsia SDK: Also copy zlib to the SDK's bin directory.

So we run with the one built in the Fuchsia tree instead of the (potentially absent) one from the host.

R=jamesr@google.com

Review-Url: https://codereview.chromium.org/2892223002 .

dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk