Switch mesa to 19.2
We drop the amd64 build since this would require e.g. clang 9.
This makes us switch to the mainline interface to handle texture descriptors on gc7000 (softpin)
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We drop the amd64 build since this would require e.g. clang 9.
This makes us switch to the mainline interface to handle texture descriptors on gc7000 (softpin)