cmd/dist: enable cgo for aix/ppc64

Change-Id: I78be2b0b857d1ea2fb0b6906eb5afd796580f52d
Reviewed-on: https://go-review.googlesource.com/c/go/+/164019
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/dist/build.go

@@ -1459,7 +1459,7 @@ func checkNotStale(goBinary string, targets ...string) {
 // single point of truth for supported platforms. This list is used
 // by 'go tool dist list'.
 var cgoEnabled = map[string]bool{
-	"aix/ppc64":       false,
+	"aix/ppc64":       true,
 	"darwin/386":      true,
 	"darwin/amd64":    true,
 	"darwin/arm":      true,