Improve solc error output (#765)
Improve solc error output (#765)

* Improve err handling when there's a solc error, print the error

* Fix bug, don't merge stdout/err

* Simplify

* Add more space

montyly/manticore,trailofbits/manticore,trailofbits/manticore,montyly/manticore,trailofbits/manticore