[M] Change in coreboot[main]: commonlib/bsd: Add strlen() and strnlen() functions

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Jakub Czapiga, Julius Werner, Maximilian Brune, Yu-Ping Wu.

Hello Jakub Czapiga, Julius Werner, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/83830?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed:
Code-Review+2 by Julius Werner, Verified+1 by build bot (Jenkins)

Change subject: commonlib/bsd: Add strlen() and strnlen() functions
......................................................................

commonlib/bsd: Add strlen() and strnlen() functions

Add strlen() and strnlen() to commonlib/bsd by rewriting them from
scratch, and remove the same functions from coreboot and libpayload.

Note that in the existing libpayload implementation, these functions
return 0 for NULL strings. Given that POSIX doesn't require the NULL
check and that other major libc implementations (e.g. glibc [1]) don't
seem to do that, the new functions also don't perform the NULL check.

[1] https://github.com/bminor/glibc/blob/master/sysdeps/i386/strlen.c

Change-Id: I1203ec9affabe493bd14b46662d212b08240cced
Signed-off-by: Yu-Ping Wu 
---
M payloads/libpayload/include/string.h
M payloads/libpayload/libc/string.c
M src/commonlib/bsd/include/commonlib/bsd/string.h
M src/commonlib/bsd/string.c
M src/include/string.h
M src/lib/string.c
M tests/commonlib/bsd/string-test.c
M tests/lib/string-test.c
8 files changed, 70 insertions(+), 103 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/83830/2