[S] Change in flashrom[master]: tests: Undefine _FORTIFY_SOURCE for unit tests to avoid _chk variants

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Felix Singer, Thomas Heijligen, Anastasia Klimchuk.

Hello Felix Singer, build bot (Jenkins), Thomas Heijligen, Angel Pons, Peter Marheine,

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

https://review.coreboot.org/c/flashrom/+/68432

to look at the new patch set (#4).

Change subject: tests: Undefine _FORTIFY_SOURCE for unit tests to avoid _chk variants
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tests: Undefine _FORTIFY_SOURCE for unit tests to avoid _chk variants

The option _FORTIFY_SOURCE, when enabled, can result in some functions
being expanded into _chk variants. For example, `fprintf` can get
expanded into `__fprintf_chk`. This makes sence for building a real
binary, but is not needed for unit tests.

In unit test environment all those functions are wrapped. In the
example above, both `fprintf` and `__fprintf_chk` needed to be mocked.
Disabling _FORTIFY_SOURCE avoids expanding functions into _chk
variants, without any loss of testing coverage because that would
be wrapped/mocked anyway.

This patch also removes two existing _chk wraps because they are not
needed anymore.

BUG=b:237606255
TEST=ninja test on
1) gcc 12.2.0 on Debian
2) clang 15.0 on Chromium OS

Ticket: https://ticket.coreboot.org/issues/411
Change-Id: I70cb1cd90d1f377ff4606acad3c1b514120ae4f7
Signed-off-by: Anastasia Klimchuk 
---
M tests/meson.build
M tests/tests.c
2 files changed, 31 insertions(+), 18 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/32/68432/4