Update dependencies (#5574)

Update vendor

vendor/golang.org/x/tools/go/packages/external.go

@@ -12,7 +12,8 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"os/exec"
+	exec "golang.org/x/sys/execabs"
+	"os"
 	"strings"
 )
 
@@ -76,15 +77,21 @@ func findExternalDriver(cfg *Config) driver {
 		}
 
 		buf := new(bytes.Buffer)
+		stderr := new(bytes.Buffer)
 		cmd := exec.CommandContext(cfg.Context, tool, words...)
 		cmd.Dir = cfg.Dir
 		cmd.Env = cfg.Env
 		cmd.Stdin = bytes.NewReader(req)
 		cmd.Stdout = buf
-		cmd.Stderr = new(bytes.Buffer)
+		cmd.Stderr = stderr
+
 		if err := cmd.Run(); err != nil {
 			return nil, fmt.Errorf("%v: %v: %s", tool, err, cmd.Stderr)
 		}
+		if len(stderr.Bytes()) != 0 && os.Getenv("GOPACKAGESPRINTDRIVERERRORS") != "" {
+			fmt.Fprintf(os.Stderr, "%s stderr: <<%s>>\n", cmdDebugStr(cmd), stderr)
+		}
+
 		var response driverResponse
 		if err := json.Unmarshal(buf.Bytes(), &response); err != nil {
 			return nil, err