Add it to the existing Clang job and also add a job that covers the
linux-user code with this compiler flag. To make sure that the detected
problems are not simply ignored, let's also use "-fno-sanitize-recover=..."
now instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210211045455.456371-3-thuth@redhat.com>
Message-Id: <20210211122750.22645-3-alex.bennee@linaro.org>