Todd Gamblin d32d5e45fb Fix issues when a package provides the same vdep twice. (#2710) ... * Fix issues when a package provides the same vdep twice. - provides() now adds to a set of provided vdeps instead of a single one. * flake8		2017-01-02 18:40:57 -08:00
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spack	Fix issues when a package provides the same vdep twice. (#2710)	2017-01-02 18:40:57 -08:00