ENH: add kFreeBSD support

Modules/Platform/kFreeBSD.cmake

@@ -0,0 +1,9 @@
+# kFreeBSD looks just like Linux.
+SET(CMAKE_DL_LIBS "-ldl")
+SET(CMAKE_SHARED_LIBRARY_C_FLAGS "-fPIC")        
+SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-shared")
+SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "-rdynamic")  
+SET(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")
+SET(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP ":")
+SET(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-Wl,-soname,")
+SET(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG "-Wl,-soname,")