cmake files: change keywords to lower case

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

doc/man/CMakeLists.txt

@@ -32,7 +32,7 @@ foreach( _dir IN LISTS _dirs )
       set( _lang_dir "/${_lang}" )
     endif()
     foreach( _man_section IN LISTS _man_sections )
-      INSTALL(
+      install(
           FILES ${_man_files_${_man_section}}
           DESTINATION ${MAN_INSTALL_DIR}${_lang_dir}/man${_man_section}
           COMPONENT doc