[lto][patch] add constant flag to constructors

[Rafael Espindola]

With this patch things like

const unsigned short foo[] = {1};

are placed on rodata instead of data.

OK for lto if bootstraps and all tests are OK?

2008-08-15  Rafael Avila de Espindola  <espindola@google.com>

	* lto-tree-flags.def (CONSTRUCTOR): Add constant_flag.

Cheers,
-- 
Rafael Avila de Espindola

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