[CMAKE] Fix cmake build (#520)

CMakeLists.txt

@@ -163,6 +163,7 @@ if(USE_LLVM)
   message(STATUS "Build with LLVM " ${LLVM_PACKAGE_VERSION})
   message(STATUS "Set TVM_LLVM_VERSION=" ${TVM_LLVM_VERSION})
   add_definitions(-DTVM_LLVM_VERSION=${TVM_LLVM_VERSION})
+  add_definitions(-DDMLC_USE_FOPEN64=0)
   llvm_map_components_to_libnames(LLVM_LIBS all)
   list(REMOVE_ITEM LLVM_LIBS LTO)
   list(APPEND TVM_LINKER_LIBS ${LLVM_LIBS})