toolchain-scripts.bbclass: unset command_not_found_handle
On Ubuntu-system, When sourcing the env.sh from an exported sdk, and
running a bogus linux command (for example "asd"), a core dump of
python is usually generated.
Unset the command_not_found_handle to fix it.
(From OE-Core master rev:
473ccbebb426df757adb8955eaa5e191d88180d1)
Signed-off-by: Fang Jia <fang.jia@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
