With the recipe specific sysroots, we need a clean tmpdir, else pseudo-native,
openssl-native, subversion-native and serf-native need to be manually cleaned.
After these there are probably more places where software doesn't rebuild correctly
even if we pass in new parameters to it.
The simplest solution is to force people to start from a clean TMPDIR since
everything would rebuild anyway.
(From OE-Core rev: da58e27a0f8fc8200f1953f05888834abd79c9f8)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
3b4a36be50