update tools path to bin for newer mkl (2020.1.217)

[acxz]

With the newer intel mkl versions the path for tools has changed to bin. I am sure a better solution can be thought of that uses the version information. This is a patch solution for now.

[coveralls]

Coverage remained the same at 94.105% when pulling 9fa5180 on acxz:bin-tools into 0d40c53 on devernay:master.

[xantares]

your patch may break older mkl installs
I think find_program is the way to go, testing both locations, can you try that:

find_program (MKL_LINK_TOOL NAMES mkl_link_tool HINTS ${MKL_ROOT_DIR}/bin ${MKL_ROOT_DIR}/tools)

also, I think it takes care of the .exe extension that is appended manually just after the set line.

[acxz]

Definitely it will break older mkl installs.

Yeah find_program is a great suggestion.

Edit: It worked for me, here is the PR for it #52