fix for dyld: Library not loaded: /usr/local/lib/libgflags.2.dylib

[rstormsf]

Add tutorial if someone has an issue:

dyld: Library not loaded: /usr/local/lib/libgflags.2.dylib

just do

brew reinstall glog

[skywinder]

Thanks, @rstormsf.

Feel free to reopen the issue, if someone still needs help. 👍