kselftest OOT run_tests

[Yauheni Kaliuta <yauheni.kaliuta@xxxxxxxxxx>]

Hi!

I'm wondering how out of tree check is supposed to work for make
O=dir run_tests from selftests (or make -C ...) directory?

(both with 051f278e9d81 ("kbuild: replace KBUILD_SRCTREE with
boolean building_out_of_srctree") and without)

make M= ... does not work with run_tests.

-- 
WBR,
Yauheni Kaliuta