Comment 1 for bug 1412441

Looks mostly fine. But it doesn't re-build on current vivid?

/usr/lib/llvm-3.6/bin/llvm-as: ./generic/lib/shared/vload_impl.ll:124:6: error: unexpected type in metadata definition
!1 = metadata !{metadata !"char", metadata !5}
     ^
Makefile:244: recipe for target 'nvptx--nvidiacl/lib/shared/vload_impl.ll.bc' failed

Besides that, the metapackage "clang" will have to be promoted to main too. But that should be simple, its llvm-defaults source package is in main already, as is clang-3.6. Which makes me wonder, is it best practices to specify a clang version in your build-depends, or should it be left as just "clang"?