build_helper_configs: Add "debug_regr" config

Copy of existing "debug" config, with regression tests enabled. Helpful
e.g. to test code coverage.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I95aa08376cae1bdfa06e4dcff1632d81017f7a5e
1 file changed