partition_filesystem, vfs_real: Add missing standard includes

src/core/file_sys/partition_filesystem.cpp

@@ -2,6 +2,9 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <algorithm>
+#include <cstddef>
+#include <cstring>
 #include <iterator>
 #include <utility>
 

src/core/file_sys/vfs_real.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <algorithm>
 #include <iterator>
 #include <utility>