Change in flashrom[master]: tests: add init_shutdown test for realtek_mst_i2c_spi

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Angel Pons, Peter Marheine.
Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/56911 )

Change subject: tests: add init_shutdown test for realtek_mst_i2c_spi
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Patch Set 6:

(1 comment)

File tests/tests.c:

https://review.coreboot.org/c/flashrom/+/56911/comment/d4da3569_197c3a6c 
PS5, Line 93: 	return __wrap_open(pathname, flags);
> I think it's so unlikely a test will ever care about the difference that it's better to pretend they […]

Ok, I can agree on that, makes sense! Then let's have the same impl
    LOG_ME;
    if (current_io && current_io->open)
    	return current_io->open(current_io->state, pathname, flags);
    return MOCK_HANDLE;
for both wraps.
This way LOG_ME will tell which wrap has been called.