[oe] Cleaning tmp folder

[Shane Dixon]

I've been digging through the bitbake files and I don't see any recipe
for cleaning the tmp folder.  I typically just blow away the entire tmp/
folder and build again, but then I'm spending time rebuilding the native
packages and crosscompiler.

Is there a bitbake recipe for cleaning out all non-native and
non-crosscompiler packages from tmp or am I stuck just starting over
each time?

-- 
Shane Dixon
Linux Engineer
Atmel Corporation
E-mail: shane.dixon at atmel.com