Add command line parameter to specify debugger arguments

[sigiesec]

It would be great to have the ability to specify additional arguments to pass to the debugger.

[sigiesec]

Oh, I found that my main use case is already the default (passing --disable-cpuid-features-ext for Pernosco compatibility).

[sigiesec]

But it may still be useful, e.g. to allow to enable rr chaos mode selectively.