Merge topic 'patch-3'

9208cafc Findutf8cpp.cmake: add utf8cpp include subdir

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Merge-request: !5560

CMake/Findutf8cpp.cmake

 find_path(utf8cpp_INCLUDE_DIR
   NAMES utf8.h
+  PATH_SUFFIXES utf8cpp
   DOC "utf8cpp include directory")
 mark_as_advanced(utf8cpp_INCLUDE_DIR)