internal/testenv: update linux-arm to linux-arm-scaleway

CL 303230 renamed the linux-arm builder to linux-arm-scaleway, but the
x/tools ExitIfSmallMachine guard was not updated accordingly, resulting
in consistent failures for some tests.

For golang/go#45931
For golang/go#46183
Updates golang/go#32834

Change-Id: Ief5f17fc61cb38cf6b7cf63b6cd5e64f9d56261e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/322409
Trust: Robert Findley <[email protected]>
Run-TryBot: Robert Findley <[email protected]>
gopls-CI: kokoro <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Rebecca Stambler <[email protected]>

Author: findleyr

internal/testenv/testenv.go

@@ -10,12 +10,13 @@ import (
 	"bytes"
 	"fmt"
 	"go/build"
-	exec "golang.org/x/sys/execabs"
 	"io/ioutil"
 	"os"
 	"runtime"
 	"strings"
 	"sync"
+
+	exec "golang.org/x/sys/execabs"
 )
 
 // Testing is an abstraction of a *testing.T.
@@ -247,8 +248,9 @@ func NeedsGoBuild(t Testing) {
 // It should be called from within a TestMain function.
 func ExitIfSmallMachine() {
 	switch os.Getenv("GO_BUILDER_NAME") {
-	case "linux-arm":
-		fmt.Fprintln(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)")
+	case "linux-arm-scaleway":
+		// "linux-arm" was renamed to "linux-arm-scaleway" in CL 303230.
+		fmt.Fprintln(os.Stderr, "skipping test: linux-arm-scaleway builder lacks sufficient memory (https://golang.org/issue/32834)")
 		os.Exit(0)
 	case "plan9-arm":
 		fmt.Fprintln(os.Stderr, "skipping test: plan9-arm builder lacks sufficient memory (https://golang.org/issue/38772)")