Adding DRI to the default build rules for MesaLib.

--HG--
extra : rebase_source : 17d7c21b9a058c2532628d8975a4aeb378ddadb2
Updating musl-cross, DOWNGRADING pkgsrc-patches.

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extra : rebase_source : 4ece5ad00a142d1ecfdee56adbb8412a5cc29d50
Updated musl-cross repo for 0.9.10.

--HG--
extra : rebase_source : 83bb5796fcf506e293ee8805730aec255240ec49