properly set OpenCL lib search path

cmake/OpenCVDetectOpenCL.cmake

@@ -20,14 +20,24 @@ else(APPLE)
               DOC "OpenCL include directory"
               NO_DEFAULT_PATH)
 
-    if (X86_64 AND WIN32)
+    if(WIN32)
+      if(X86_64)
         set(OPENCL_POSSIBLE_LIB_SUFFIXES lib/Win64 lib/x86_64 lib/x64)
-    elseif (X86 AND WIN32)
+      elseif(X86)
         set(OPENCL_POSSIBLE_LIB_SUFFIXES lib/Win32 lib/x86)
-    elseif (X86_64 AND UNIX)
+      else()
+        set(OPENCL_POSSIBLE_LIB_SUFFIXES lib)
+      endif()
+    elseif(UNIX)
+      if(X86_64)
         set(OPENCL_POSSIBLE_LIB_SUFFIXES lib64 lib)
-    elseif (X86 AND UNIX)
+      elseif(X86)
         set(OPENCL_POSSIBLE_LIB_SUFFIXES lib32 lib)
+      else()
+        set(OPENCL_POSSIBLE_LIB_SUFFIXES lib)
+      endif()
+    else()
+      set(OPENCL_POSSIBLE_LIB_SUFFIXES lib)
     endif()
 
     find_library(OPENCL_LIBRARY