Fixes go1.21 error on i686 -
  runtime/cgo(.text): unknown symbol __stack_chk_fail_local in pcrel

--- a/go/src/cmd/go/script_test.go
+++ b/go/src/cmd/go/script_test.go
@@ -285,6 +285,7 @@ var extraEnvKeys = []string{
 	"GO_TESTING_GOTOOLS", // for gccgo testing
 	"GCCGO",              // for gccgo testing
 	"GCCGOTOOLDIR",       // for gccgo testing
+	"CGO_CFLAGS",         // for working around "unknown symbol __stack_chk_fail_local" error on x86
 }
 
 // updateSum runs 'go mod tidy', 'go list -mod=mod -m all', or