cmd/dist, internal/platform: mark windows/arm (32-bit ARM) broken

The port is reportedly broken, and there isn't a builder testing it.

For #68552.
For #67308.

Change-Id: Iababa17cdf855b675aaf85642a667e8081ef5dfe
Reviewed-on: https://go-review.googlesource.com/c/go/+/601777
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>

Author: dmitshur

src/cmd/dist/build.go

@@ -1785,6 +1785,7 @@ var cgoEnabled = map[string]bool{
 var broken = map[string]bool{
 	"linux/sparc64":  true, // An incomplete port. See CL 132155.
 	"openbsd/mips64": true, // Broken: go.dev/issue/58110.
+	"windows/arm":    true, // Broken: go.dev/issue/68552.
 }
 
 // List of platforms which are first class ports. See go.dev/issue/38874.