build_libs.sh error

```
configure: error: C compiler cannot create executables
See config.log' for more details.
fatal error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo: can't open input file: simulator_build/lib/libproj.a (No such file or directory)
cp: simulator_build/include/*: No such file or directory
All Done!`
```
