sanitycheck: ignore generated headers in outdir
sanitycheck: ignore generated headers in outdir

With this, we will get results for the same file for every build (tests
and samples).

Signed-off-by: Anas Nashif <0d9952ec84ac43c159f6b7e7ed99a9080c00dd6e@intel.com>

GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,punitvara/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,galak/zephyr,nashif/zephyr,punitvara/zephyr,explora26/zephyr,finikorg/zephyr,ldts/zephyr,explora26/zephyr,punitvara/zephyr,galak/zephyr,nashif/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,explora26/zephyr,punitvara/zephyr,finikorg/zephyr,nashif/zephyr,ldts/zephyr,ldts/zephyr,Vudentz/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,ldts/zephyr,nashif/zephyr,Vudentz/zephyr,galak/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,Vudentz/zephyr,finikorg/zephyr,finikorg/zephyr