Fix libopencv_ffi.so location on linux

[guyluz11]

Fix: #9

[Levi-Lesches]

So actually, this isn't quite correct. The expected flow is to run build.sh and add the dist folder to your LD_LIBRARY_PATH as mentioned in the last bit of output. Once you do that, only the filename will work, not dist. This is intentional because this library is only a package to be used in a larger project that won't have the dist folder inside, so the dist folder here serves as your computer's "master copy" of the binaries.

Thank you for your interest though!