[lto][patch] Output references to variables used only in initializers of static variables

[Rafael Espindola]

I missed the case of initializers of static variables in my previous
patch. The attached patch fixes it. For example, in

extern int flag_exceptions;
static int *foo = &flag_exceptions

we were not producing an undefined reference to flag_exceptions.

OK if bootstraps and tests are ok?

2010-01-08  Rafael Avila de Espindola  <espindola@google.com>

	* lto-streamer-out.c (output_unreferenced_globals): Output static
	variables.

2010-01-08  Rafael Avila de Espindola  <espindola@google.com>

	* gcc.dg/lto/20100108_0.c: New.


Cheers,
-- 
Rafael Ávila de Espíndola
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