5282f6e33f
This change created a CFv2 build target and provided two implementations of the FuchsiaEmulator, so that I can continually work on both CFv2 build and test script integration independently. The v2 target can be built with ``` tools/build.py --os fuchsia --mode release fuchsia_ffi_test_package_cfv2 ``` And v2 FuchsiaEmulator implementation can be triggered with FUCHSIA_CFV2 environment variable. Bug: #38752 Change-Id: I31936a2ca967fbfeb2bc5628e2f005aef6762687 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/322583 Reviewed-by: Alexander Thomas <athom@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Zijie He <zijiehe@google.com>