README: Include binutils fuzz readelf examples

[Cybergenik]

The current docker demo is good, but it's only fuzzing a trivial program. To show that Hopper can fuzz more exciting targets, I wrote similar scripts that will automatically let you fuzz readelf in a local machine all through docker, found in examples/binutils/local/

Also the scripts in examples /binutils/readelf/dist were the ones I used to test Hopper running in a distributed environment. They might be useful to make examples for as well.

[Cybergenik]

Added readelf dist and local examples:
901e6b0