Fix //third_party/libaddressinput:string target on iOS.
Fix //third_party/libaddressinput:string target on iOS.

Chrome on iOS uses different names for pt-BR and es-419 locales.
Update third_party/libaddressinput/BUILD.gn to list different
outputs when targetting iOS.

BUG=459705

Review URL: https://codereview.chromium.org/1444623002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#359746}

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