store.exp failure on i686-linux with newer gcc's

[Joel Brobecker]

> value->lval is set to not_lval and value_assign doesn't like that so
> gdb refuses to set the variable with "Left operand of assignment is
> not an lvalue."

IIRC, this is a know limitation in GDB. Daniel wrote the piece that
allows us to read variables that are spread across several locations
like this.  But i don't think anyone has thought about being able
to write to such a variable.

-- 
Joel