test/watchdog: Don't use designated initializers

gcc supported this in c++ even though it was non-standard until c++2a is
complete. This change removes designated initializers to make our tests
compliant with std++17.

Tested:
    Built and run through unit tests.

Change-Id: I846394c633c0396518db6ed41682bbcf05b890c6
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed