[M] Change in flashrom[master]: tests: Detect llvm coverage run and redirect to real I/O functions

[Evan Benn (Code Review)]

Attention is currently required from: Evan Benn.

Hello build bot (Jenkins), Anastasia Klimchuk,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/69267

to look at the new patch set (#11).

Change subject: tests: Detect llvm coverage run and redirect to real I/O functions
......................................................................

tests: Detect llvm coverage run and redirect to real I/O functions

Code coverage writes data to disk, we need to use real io functions at
this point so that the data is really written.

BUG=b:187647884
BRANCH=None
TEST=llvm-profdata merge -sparse default.profraw -o default.profdata
TEST=llvm-cov show ./flashrom_unit_tests
-instr-profile=default.profdata --format=html --output-dir=.

Change-Id: I21cc1d631e92fa19006b967e85676f108e80b307
Signed-off-by: Evan Benn 
---
M Documentation/building.md
M tests/io_real.c
M tests/tests.c
M tests/wraps.h
4 files changed, 50 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/67/69267/11