TestBuildAddTarXz/TestBuildAddTarXzGz make exec calls like
'cd %SOME_TEMP_DIR%; xz test.gz' but this fails when called
from integration-cli tests (doesn't fail from msys or cmd shell).
It fails with error: "xz: test.tar: Cannot remove: Permission denied."
Proposing workaround of using the `xz --keep` argument since keeping
test.tar is harmless and it's already in os.TempDir().
Signed-off-by: Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>
Upstream-commit: 2f53820ce409ce1afb6513b7799d094b9c53779d
Component: engine
01e622e5b7