[yocto] [Question] How to walkaround this build warning

[Bian, Naimeng]

Hi folks

I built my image and got the following warning message in do_rootfs.
----------------------------------------------------------------------
Output from gdk-pixbuf-loader-png-2.30.8-r0 at core2_64:
sed: warning: failed to get security context of /yocto/build/x86_64/tmp/work/xxxx/intercept_scripts/update_pixbuf_cache: No data available
Output from gdk-pixbuf-loader-gif-2.30.8-r0 at core2_64:
sed: warning: failed to get security context of /yocto/build/x86_64/tmp/work/xxxx/intercept_scripts /update_pixbuf_cache: No data available
----------------------------------------------------------------------

My poky is 1.7.1 as below
----------------------------------------------------------------------
DISTRO = "poky"
DISTRO_NAME = "Poky (Yocto Project Reference Distro)"
DISTRO_VERSION = "1.7.1"
DISTRO_CODENAME = "dizzy"
---------------------------------------------------------------------

Any suggestion, thanks.

Cheers
 Bian