test: add first autoboot unit tests

This adds tests for the crypt-based and plain SHA256-based password hashing
algorithms in the autoboot flow.

Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/common/Makefile b/test/common/Makefile
new file mode 100644
index 0000000..24c9145
--- /dev/null
+++ b/test/common/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+obj-y += cmd_ut_common.o
+obj-$(CONFIG_AUTOBOOT) += test_autoboot.o