spi_flash: Enable flash emulation down to ROM function calls

components/spi_flash/sim/stubs/log/log.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <time.h>
+
+#include "esp_log.h"
+
+void esp_log_write(esp_log_level_t level,
+                   const char *tag,
+                   const char *format, ...)
+{
+    va_list arg;
+    va_start(arg, format);
+    vprintf(format, arg);
+    va_end(arg);
+}
+
+uint32_t esp_log_timestamp()
+{
+    return 0;
+}
+