package_manager: default to have scriptlet output captured in log
We need to have scriptlet output captured in log. If we don't do so,
some useful information from scriptlets (especially postinstall script)
would be missing. In case a script has a warning message but it does not
necessarily have to fail, the message should be captured.
Opkg has already done that. Change for rpm and dpkg so that scriptlet
output is captured and no warning message is missing.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
