bootstd: Add tests for bootstd including all uclasses

Add a set of combined tests for the bootdev, bootflow and bootmeth
commands, along with associated functionality.

Expand the sandbox console-recording limit so that these can work.

These tests rely on a filesystem script which is not yet added to the
Python tests. It is included here as a shell script.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/boot/bootstd_common.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Common header file for bootdev, bootflow, bootmeth tests
+ *
+ * Copyright 2021 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __bootstd_common_h
+#define __bootstd_common_h
+
+/* Declare a new bootdev test */
+#define BOOTSTD_TEST(_name, _flags) \
+		UNIT_TEST(_name, _flags, bootstd_test)
+
+struct unit_test_state;
+
+/**
+ * bootstd_test_drop_bootdev_order() - Remove the existing boot order
+ *
+ * Drop the boot order so that all bootdevs are used in their alias order
+ *
+ * @uts: Unit test state to use for ut_assert...() functions
+ */
+int bootstd_test_drop_bootdev_order(struct unit_test_state *uts);
+
+#endif