Show the filesystem types and origins in the list (except ISO)

Core/FileSystems/MetaFileSystem.h

@@ -131,7 +131,7 @@ public:
 	bool RemoveFile(const std::string &filename) override;
 	int  Ioctl(u32 handle, u32 cmd, u32 indataPtr, u32 inlen, u32 outdataPtr, u32 outlen, int &usec) override;
 	PSPDevType DevType(u32 handle) override;
-	FileSystemFlags Flags() override { return FileSystemFlags::NONE; }
+	FileSystemFlags Flags() const override { return FileSystemFlags::NONE; }
 	u64  FreeDiskSpace(const std::string &path) override;
 
 	// Convenience helper - returns < 0 on failure.
@@ -155,6 +155,8 @@ public:
 		}
 	}
 
+	void Describe(char *buf, size_t size) const override { snprintf(buf, size, "Meta"); }
+
 private:
 	int64_t RecursiveSize(const std::string &dirPath);
 };