Add a runtime test in order to detect undesired changes in behavior of
the get-developers script.
The test uses a .patch file generated against the buildroot tree as a
fixture to check how get-developers operates when called to check it.
The test also overrides the DEVELOPERS file in order to be fully
reproducible and a -d option is added to get-developers in order to
allow this. Since get-developers only looks to already committed
files to compare against patch files, the fixture uses a package that
is very unlikely to be removed from buildroot tree: binutils.
Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
[Thomas: extracted from a larger patch from Ricardo, submitted at
https://patchwork.ozlabs.org/project/buildroot/patch/20220528014832.289907-1-ricardo.martincoski@gmail.com/]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
