go/packages,internal/lsp: skip memory-intensive tests on the linux-arm builder

Updates golang/go#32834
Updates golang/go#30309

Change-Id: I75edb84776216523d00fadfb2e2d94ae08533c03
Reviewed-on: https://go-review.googlesource.com/c/tools/+/192336
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

go/packages/packages_test.go

@@ -26,6 +26,15 @@ import (
 	"golang.org/x/tools/go/packages/packagestest"
 )
 
+func TestMain(m *testing.M) {
+	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
+		fmt.Fprintf(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)\n")
+		os.Exit(0)
+	}
+
+	os.Exit(m.Run())
+}
+
 // TODO(adonovan): more test cases to write:
 //
 // - When the tests fail, make them print a 'cd & load' command

internal/lsp/cmd/cmd_test.go

@@ -7,6 +7,7 @@ package cmd_test
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -18,6 +19,15 @@ import (
 	"golang.org/x/tools/internal/lsp/tests"
 )
 
+func TestMain(m *testing.M) {
+	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
+		fmt.Fprintf(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)\n")
+		os.Exit(0)
+	}
+
+	os.Exit(m.Run())
+}
+
 type runner struct {
 	exporter packagestest.Exporter
 	data     *tests.Data

internal/lsp/lsp_test.go

@@ -9,6 +9,7 @@ import (
 	"context"
 	"fmt"
 	"go/token"
+	"os"
 	"os/exec"
 	"path/filepath"
 	"sort"
@@ -24,6 +25,15 @@ import (
 	"golang.org/x/tools/internal/span"
 )
 
+func TestMain(m *testing.M) {
+	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
+		fmt.Fprintf(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)\n")
+		os.Exit(0)
+	}
+
+	os.Exit(m.Run())
+}
+
 func TestLSP(t *testing.T) {
 	packagestest.TestAll(t, testLSP)
 }