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>

common/Kconfig.boot

@@ -907,7 +907,7 @@ config AUTOBOOT_STOP_STR_CRYPT
 	  and saved in the environment variable "bootstopkeycrypt".
 
 config AUTOBOOT_STOP_STR_SHA256
-	string "Stop autobooting via SHA256 encrypted password"
+	string "Stop autobooting via SHA256 hashed password"
 	depends on AUTOBOOT_STOP_STR_ENABLE
 	help
 	  This option adds the feature to only stop the autobooting,

common/console.c

@@ -773,6 +773,11 @@ int console_record_avail(void)
 	return membuff_avail((struct membuff *)&gd->console_out);
 }
 
+int console_in_puts(const char *str)
+{
+	return membuff_put((struct membuff *)&gd->console_in, str, strlen(str));
+}
+
 #endif
 
 /* test if ctrl-c was pressed */