Leslie Zhai authored Jan 05, 2017 and Kevin Funk committed Jan 05, 2017

flex-2.6.3 failed to

```
  #define yymore() yymore_used_but_not_detected
```

throw yymore_used_but_not_detected undefined issue, so I simply added --yymore option for CMakeLists.txt

REVIEW: 129766
BUG: 374523
FIXED-IN: 2.0.1