[PATCH] ld.so: add an --argv0 option

[Florian Weimer]

* Mike Frysinger:

> Sometimes when you run a program you want the argv[0] string passed to
> the app to be different than the actual path you used to load it.  We
> can't do this today with invoking via ld.so which can be limiting --
> some programs like to inspect their argv[0] and make decisions as to
> how it should (re)exec itself or helper tools.  For example, clang and
> gcc both do argv[0] inspection to support relocatable toolchains.

Interesting idea.  I think it's sufficiently to include this, but it
needs a ChangeLog entry and a test case.