TST/BUG: some buggy windows tests
xref #10630 
- [x] csv parsing then turning into a recarray causing segfaults, only when run with the entire parsing tests (e.g. `test_parsing.py` (2 tests) (#13373)
- [ ] in `test_libsparse`, the test_intersect is segfaulting, not really sure why.
- [ ] in `test_ujson` with small exponentials, only on win-64 with 2.7.
