cmd/cgo/internal/testsanitizers: skip asan tests when FIPS140 mode is on

Executing "GODEBUG=fips140=on go test -run TestASAN
./cmd/cgo/internal/testsanitizers" fails because FIPS 140 mode is
incompatible with ASAN.

Change-Id: I1a489f3398bbabf597fe7ffc0982c86c3b86e07e
Reviewed-on: https://go-review.googlesource.com/c/go/+/685495
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/cmd/cgo/internal/testsanitizers/asan_test.go

@@ -8,6 +8,7 @@ package sanitizers_test
 
 import (
 	"bytes"
+	"crypto/fips140"
 	"fmt"
 	"internal/platform"
 	"internal/testenv"
@@ -157,6 +158,10 @@ func mustHaveASAN(t *testing.T) *config {
 		t.Skipf("skipping on %s/%s; -asan option is not supported.", goos, goarch)
 	}
 
+	if fips140.Enabled() {
+		t.Skipf("skipping with FIPS 140 mode; -asan option is not supported.")
+	}
+
 	// The current implementation is only compatible with the ASan library from version
 	// v7 to v9 (See the description in src/runtime/asan/asan.go). Therefore, using the
 	// -asan option must use a compatible version of ASan library, which requires that