internal/traceparser: skip test on iOS

Change-Id: Ifc9581ba82a13f507c288282b517ebf8a5f93b4e
Reviewed-on: https://go-review.googlesource.com/c/148058
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

src/internal/traceparser/gc_test.go

@@ -6,6 +6,7 @@ package traceparser
 
 import (
 	"math"
+	"runtime"
 	"testing"
 	"time"
 )
@@ -75,6 +76,9 @@ func TestMMU(t *testing.T) {
 }
 
 func TestMMUTrace(t *testing.T) {
+	if runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
+		t.Skipf("files from outside the package are not available on %s/%s", runtime.GOOS, runtime.GOARCH)
+	}
 	// Can't be t.Parallel() because it modifies the
 	// testingOneBand package variable.