Fix function pointer test for header-checker.

Test: changing tests/integration/cpp/include/abstract_class.h changes to
      test results. This would not happen earlier, since inadvertently,
      the test used to pick up abi references locally instead of freshly
      creating them.

Change-Id: Ie9604cc09df1ab5a87996f1ecd141f228d67a765
1 file changed