sanitycheck --platform <foo> doesn't filter tests properly (any longer) #573
Description
This is primarily reported against https://ci.linaro.org/view/lite-iot-ci/job/zephyr-upstream/796/PLATFORM=96b_carbon,ZEPHYR_GCC_VARIANT=zephyr,label=docker-xenial-amd64-13/consoleFull (Linaro Zephyr CI Jenkins job), which has following build log (for 60e752a):
+ sanitycheck --platform 96b_carbon --inline-logs --build-only --outdir /home/buildslave/srv/zephyr/zephyr/96b_carbon --no-clean --enable-slow --ccache
Building testcase defconfigs...
5107 tests selected, 13193 tests discarded due to filters
96b_carbon tests/crypto/ecc_dsa/test PASSED
zedboard_pulpino tests/kernel/context/test PASSED
qemu_nios2 tests/kernel/mem_pool/mem_pool/test PASSED
cc3200_launchxl samples/drivers/random/test PASSED
...
As can be seen, --platform 96b_carbon option didn't seem to work, instead tests for all archs and platforms get selected.
The suspicion is that this started to happen after a792a3d refactor.