fix typo in legacy FAPPEND definition

arch/i386/bits/fcntl.h

@@ -23,7 +23,7 @@
 #define F_DUPFD_CLOEXEC 1030
 
 #ifdef _GNU_SOURCE
-#define FAPPENT O_APPEND
+#define FAPPEND O_APPEND
 #define FFSYNC O_FSYNC
 #define FASYNC O_ASYNC
 #define FNONBLOCK O_NONBLOCK