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: Id2c62a6a69b151c5c7f504cfd94bc2be8c851c31
1 file changed