Add tests to check loading library.
Add tests to check loading library.

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