symbol renaming to avoid library conflicts

[stevengj]

It might be nice to provide an easy way to rename all the symbols in a library, to avoid conflicts with other external libraries like we encountered in JuliaLang/julia#4923.

For example, if you included GNU objcopy in your cross-compile setup, then something like --prefix-symbols could be used for this without modifying any source code.

[staticfloat]

This is a neat idea, and we should think about it. However, this should be moved to the BinaryBuilder.jl issue tracker. Let's continue discussion there.