FindOpenCL: Search per-architecture path suffixes on UNIX
Use different path suffixes to find opencl for x86 and x86_64. We already do this on Windows.
After installation AMD APP SDK on x86 linux is appeared directory
/opt/AMDAPPSDK-3.0/lib/x86_64/
which contains symlink libOpenCL.so
to non-existed /usr/lib/libOpenCL.so.1
Topic-rename: FindOpenCL-arch-paths
Edited by Brad King