This is a reland of commit e6d55c6c2f
Reworks guards for 64-bit Windows unwinding support code so that
it is not included in any 64-bit Windows gen_snapshot executable that
targets a non-64-bit Windows platform.
TEST=ci, build only
Original change's description:
> Add gen_snapshot binaries, producing Linux ARM64/x64 snapshots
>
> Inspired by `//runtime/bin:gen_snapshot_fuchsia`, required for go/dart-cross-compile.
>
> TEST=ci, build only
>
> Change-Id: Ie521c984a8f44d25f3f78d946af9416582a572dc
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/410402
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
Change-Id: I4f1323ac8f7ab215c2dffeef188f70c466fb62ea
Cq-Include-Trybots: luci.dart.try:vm-win-release-arm64-try,vm-win-release-ia32-try,vm-win-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413402
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ivan Inozemtsev <iinozemtsev@google.com>
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
Ivan Inozemtsev
a5077aa352