[yocto] build failures after pull

[Jim Abernathy]

I've reported this before, but it still happens.  Today, I did a git 
pull into my local while master was checked out, both on poky and 
meta-intel.  I then tried to rerun without cleaning or deleting anything 
for chiefriver. My last build had been successfully built, but didn't 
have audio.  So when I saw patches, I thought I'd test again.  I simply did

"source oe-init-build-env"
"bitbake core-image-sato"

I got a failure in diffutils for some reason.  I then did

"bitbake -c cleansstate diffutils"
"bitbake core-image-sato".

This time it worked.

Jim A