Note: there is a bit of potential confusion about the difference between
/resources/builder.inc.sh (the full implementation for builder scripts),
and /resources/build/builder.inc.sh (the source script that builder
scripts should always use).
This allows us to make assumptions that will always be true for builder
scripts that may not be true for other scripts, such as setting base
folder.
Fixes#11324.
* Always `cd "$THIS_SCRIPT_PATH"`
* Remove unnecessary `cd` from all build.sh
* Remove unnecessary `set -eu` from all build.sh (and `# set -x`)
* Replace old build-utils.sh incantation in a few build.sh scripts
This allows to use the `linux/build.sh` file to specify the
`--no-integration` flag which makes it easier to specify jobs on CI
because it then doesn't need to know all subprojects.
Some of the configuration files are useful for other distributions
as well. So this change moves them out of `debian/` to
`linux/keyman-config` so that they will be included in the source
tar ball.
Also remove zero-width space from one file.
Closes#8880.
