s390/test_unwind: minor cleanup

- make current_test static
- use current_test consistently
- add TEST_WITH_FLAGS macro to contract parametrized tests definition

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2022-01-31 19:00:56 +01:00
commit 93bd323244