Add doc-building deps
Add doc-building deps

pitrou/llvmlite,numba/llvmlite,m-labs/llvmlite,ssarangi/llvmlite,numba/llvmlite,numba/llvmlite,ssarangi/llvmlite,m-labs/llvmlite,pitrou/llvmlite,markdewing/llvmlite,markdewing/llvmlite,markdewing/llvmlite,m-labs/llvmlite,numba/llvmlite,ssarangi/llvmlite,pitrou/llvmlite,pitrou/llvmlite,markdewing/llvmlite,m-labs/llvmlite,ssarangi/llvmlite