cmd/link: Add missing platform for Mac Catalyst
Fixes #67175
Defines a MachoPlatorm constant in OS_Darwin for MacCatalyst build. This enables adding the suffix $INODE64 on syscall methods needed for amd64 Darwin platform.
Change-Id: Ie677e241599e2a14359c5809fa9ddb3b63161629
GitHub-Last-Rev:
feae982e682d5b0479fe1c7eccdc423dc4bf2ea4
GitHub-Pull-Request: golang/go#67176
Reviewed-on: https://go-review.googlesource.com/c/go/+/583295
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>