Add -Wno-error=shadow build option for kdbus tests
In some different build environment (e.g., product divisions),
several strict compilation options can be added like -Werror=shadow.
Shadowing is intentional and not a bug in tests so that we avoid this build error
by adding -Wno-error=shadow
[ 105s] kdbus-test.h:42:20: error: declaration of '_ASSERT_RETURN_VAL_val0_' shadows
a previous local [-Werror=shadow]
[ 105s] 42 | __auto_type const _ASSERT_RETURN_VAL_val0_ = (val0);\
Change-Id: Ia4f8a746dce0b39c896daf2e4cd1c87f62a8dadd
Signed-off-by: Hyotaek Shim <hyotaek.shim@samsung.com>
(cherry picked from commit
614454cc441948f3c8c68ac2408fa86d7a716fa8)