[coreboot-gerrit] Change in coreboot[master]: tests: Add lib/string-test test case

[Name of user not set (Code Review)]

Hello build bot (Jenkins), Patrick Georgi, Martin Roth,

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

https://review.coreboot.org/c/coreboot/+/40538

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

Change subject: tests: Add lib/string-test test case
......................................................................

tests: Add lib/string-test test case

This commit's purpose is to show basic example of how unit testing may
be applied for coreboot project. It adds test harness for lib/string.c
module.

TEST=Install cmocka via appropriate command:
sudo apt-get install -y libcmocka-dev
sudo emerge dev-util/cmocka
yum install libcmocka-devel
* Build and run unit tests via `make unit-tests`
* Check the output to see that tests passed.

Signed-off-by: Jan Dabros 
Change-Id: Ibf5554d1e99a393721a66bdd35af0122c2e412c4
---
A tests/lib/Makefile.inc
A tests/lib/string-test.c
2 files changed, 66 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/40538/2