[yocto] Why didn't deploy source archive by license from yocto-1.6

[Lei, Maohui]

Hi,

I found that before yocto-1.6, source archives were deployed by license. 

The following commit changed the directory for deploying source archives:
cbcf5b219858b58c4429ee87444eaacc5a7cfa3e

But from commit log, there is no explaining about this change.

Are there someone who can tell me why.

Best regards
Lei