fix issue where two outdirs are created
fix issue where two outdirs are created

O was getting passed along to the main Kbuild Make session which is
called with -C. If O was a relative path, the outdir would effectively
become $(ZEPHYR_BASE)/$(O) which is not what we want.

Change-Id: I148539490ecfc2d4e84a0fdf3e3dd1ab24503633
Signed-off-by: Andrew Boie <aab045b28152628be6af0e556050d0381fd0a34d@intel.com>

fractalclone/zephyr-riscv,mirzak/zephyr-os,zephyrproject-rtos/zephyr,sharronliu/zephyr,rsalveti/zephyr,punitvara/zephyr,jamesonwilliams/zephyr-kernel,fractalclone/zephyr-riscv,bboozzoo/zephyr,runchip/zephyr-cc3220,zephyrproject-rtos/zephyr,runchip/zephyr-cc3220,sharronliu/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,mirzak/zephyr-os,aceofall/zephyr-iotos,Vudentz/zephyr,runchip/zephyr-cc3220,galak/zephyr,holtmann/zephyr,pklazy/zephyr,32bitmicro/zephyr,jamesonwilliams/zephyr-kernel,32bitmicro/zephyr,explora26/zephyr,aceofall/zephyr-iotos,nashif/zephyr,rsalveti/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,rsalveti/zephyr,mbolivar/zephyr,holtmann/zephyr,runchip/zephyr-cc3200,rsalveti/zephyr,jamesonwilliams/zephyr-kernel,mirzak/zephyr-os,zephyriot/zephyr,nashif/zephyr,tidyjiang8/zephyr-doc,ldts/zephyr,bboozzoo/zephyr,Vudentz/zephyr,galak/zephyr,runchip/zephyr-cc3200,explora26/zephyr,coldnew/zephyr-project-fork,bboozzoo/zephyr,sharronliu/zephyr,kraj/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,tidyjiang8/zephyr-doc,aceofall/zephyr-iotos,nashif/zephyr,finikorg/zephyr,mbolivar/zephyr,aceofall/zephyr-iotos,fbsder/zephyr,galak/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,sharronliu/zephyr,fractalclone/zephyr-riscv,zephyriot/zephyr,jamesonwilliams/zephyr-kernel,coldnew/zephyr-project-fork,punitvara/zephyr,finikorg/zephyr,finikorg/zephyr,kraj/zephyr,ldts/zephyr,fbsder/zephyr,bboozzoo/zephyr,mbolivar/zephyr,fbsder/zephyr,bigdinotech/zephyr,GiulianoFranchetto/zephyr,erwango/zephyr,coldnew/zephyr-project-fork,erwango/zephyr,kraj/zephyr,ldts/zephyr,punitvara/zephyr,runchip/zephyr-cc3220,bigdinotech/zephyr,runchip/zephyr-cc3220,mirzak/zephyr-os,32bitmicro/zephyr,finikorg/zephyr,mbolivar/zephyr,pklazy/zephyr,holtmann/zephyr,nashif/zephyr,explora26/zephyr,tidyjiang8/zephyr-doc,coldnew/zephyr-project-fork,erwango/zephyr,kraj/zephyr,bigdinotech/zephyr,sharronliu/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,nashif/zephyr,fractalclone/zephyr-riscv,holtmann/zephyr,GiulianoFranchetto/zephyr,runchip/zephyr-cc3200,explora26/zephyr,ldts/zephyr,fbsder/zephyr,mbolivar/zephyr,erwango/zephyr,punitvara/zephyr,Vudentz/zephyr,explora26/zephyr,galak/zephyr,erwango/zephyr,fbsder/zephyr,32bitmicro/zephyr,jamesonwilliams/zephyr-kernel,coldnew/zephyr-project-fork,runchip/zephyr-cc3200,32bitmicro/zephyr,galak/zephyr,pklazy/zephyr,punitvara/zephyr,aceofall/zephyr-iotos,rsalveti/zephyr,fractalclone/zephyr-riscv,pklazy/zephyr,bigdinotech/zephyr,tidyjiang8/zephyr-doc,bigdinotech/zephyr,GiulianoFranchetto/zephyr,bboozzoo/zephyr,tidyjiang8/zephyr-doc,holtmann/zephyr,pklazy/zephyr,zephyriot/zephyr,mirzak/zephyr-os,runchip/zephyr-cc3200,zephyriot/zephyr