Support defines from project settings

ProjectSettings/ProjectSettings.asset
```yaml
  scriptingDefineSymbols:
    1: CROSS_PLATFORM_INPUT
    4: CROSS_PLATFORM_INPUT;MOBILE_INPUT;NO_GPGS
    7: CROSS_PLATFORM_INPUT;MOBILE_INPUT
    14: MOBILE_INPUT
    17: MOBILE_INPUT
    20: MOBILE_INPUT
```

1 - desktop
2 - ios
7 - android

idk it's stable id or not