Merge branch 'gt/unit-test-oid-array'

Another unit-test.

* gt/unit-test-oid-array:
  t: port helper/test-oid-array.c to unit-tests/t-oid-array.c

diff --cc Makefile
Simple merge

diff --cc t/helper/test-tool.c
Simple merge

diff --cc t/helper/test-tool.h
Simple merge