Fix GregorianCalendarTest#test_addII.

We're going through the trouble of accounting for
DST changes in GregorianCalendar.add(int, int) (as per
the spec), so adjust our tests to agree.

bug: 12778197

(cherry picked from commit 1326a80ee854ad7df3ac183874734e418194572c)

Change-Id: I92b072e2385c7fbd6fcac9de25eec7542d53e2d6
1 file changed