Add more missing headers

src/BaseException.cpp

@@ -3,6 +3,7 @@
 #include <string>
 #include <sstream>
 #include <iostream>
+#include <mutex>
 #include <boost/filesystem/path.hpp>
 #include <boost/filesystem/operations.hpp>
 #include <boost/log/trivial.hpp>

src/slic3r/GUI/fts_fuzzy_match.h

@@ -33,6 +33,7 @@
 
 #include <cstdint> // uint8_t
 #include <ctype.h> // ::tolower, ::toupper
+#include <cwctype> // ::towlower
 #include <cstring> // memcpy
 
 #include <cstdio>