85cdc0eac2
Allow controlling the target ABI by defining TARGET_ABI_IOS or TARGET_ABI_EABI. If neither is defined, default to the previous behavior. Make Linux, Mac, Android and iOS agree on the value of PreferredCodeAlignment for all architectures. BUG=http://dartbug.com/26464 R=zra@google.com Review URL: https://codereview.chromium.org/1982613003 .