Added missed include for the OSX build

src/libslic3r/Format/3mf.cpp

@@ -11,6 +11,7 @@
 #include <boost/algorithm/string/classification.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string/replace.hpp>
 #include <boost/filesystem/operations.hpp>
 #include <boost/nowide/fstream.hpp>
 #include <boost/nowide/cstdio.hpp>