[M] Change in flashrom[master]: tests: Mock the mode_t variant of open

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Evan Benn.

Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/69263 )

Change subject: tests: Mock the mode_t variant of open
......................................................................

Patch Set 4:

(1 comment)

File tests/tests.c:

https://review.coreboot.org/c/flashrom/+/69263/comment/55d30bcf_fecbc935 
PS4, Line 103: mode_t mode = 0;
             : 	if (flags & O_CREAT) {
             : 		va_list ap;
             : 		va_start(ap, flags);
             : 		mode = va_arg(ap, mode_t);
             : 		va_end(ap);
             : 	}
This code repeats for all variants of open wraps, can this code go to mock_open?