The standard library on non-Intel targets get compared to the baseline
from the Intel targets which is not guaranteed to be identical. Mark
the checks as expected failures on non-x86_64 targets. Although this is
entirely unsatisfying, it allows progress in the short term.
Most of this is enabled by an upstream change to generalize the tests
for the api-digester to properly handle all targets. The primary change
here is to account for the Swift-level ABI differences for the standard
library between Apple Silicon macOS and Intel macOS. Specifically, anything
related to Float80 will be removed from the standard library on Apple Silicon
macOS, so account for the differences.
The framework baselines are installed at 'lib/swift/FrameworkABIBaseline' and the
tool is inside 'bin'. This patch teaches the executable to locate baselines
from the relative path.
In addition, this patch moves the stdlib ABI/API baselines to the canonical
location so we don't have to check the stability of the stdlib using a
different mechanism from other Swift frameworks.
