Added CreateDirectory function to service/fs.cpp, and in Archive.

src/core/file_sys/archive_romfs.cpp

@@ -33,6 +33,16 @@ std::unique_ptr<File> Archive_RomFS::OpenFile(const std::string& path, const Mod
     return std::unique_ptr<File>(new File_RomFS);
 }
 
+/**
+ * Create a directory specified by its path
+ * @param path Path relative to the archive
+ * @return Whether the directory could be created
+ */
+bool Archive_RomFS::CreateDirectory(const std::string& path) const {
+    ERROR_LOG(FILESYS, "Attempted to create a directory in ROMFS.");
+    return false;
+};
+
 /**
  * Open a directory specified by its path
  * @param path Path relative to the archive