Tweaks to make colab work on windows.
Tweaks to make colab work on windows.

Closes #98

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/iree/pull/98 from stellaraccident:colab1 cdff892828100861af5d2abeeab4f9bd1bcf1660
PiperOrigin-RevId: 276391116

google/iree,iree-org/iree,google/iree,google/iree,iree-org/iree,google/iree,iree-org/iree,google/iree,iree-org/iree,iree-org/iree,iree-org/iree,google/iree,iree-org/iree,google/iree