V3 static data in classes vs AIX

[David Edelsohn]

	Investigating this further, GCC only produces the common symbol if
the static class member actually is defined, not just referenced.  In
other words,

class foo {
public:
        static int i;
};

void p()
{
        foo::i = 99;
}

does not produce a common symbol, only the reference.

	The existence of a common symbol for the testcases means that
there is some definition in the header files or the compiler is generating
a definition for some input where it should not.  This clearly is a bug.
I am going to try to see exactly what input is required to produce the
common symbol.

David