sync with psm: add copyright notice

libc/sysdeps/linux/mips/pipe.S

@@ -1,4 +1,9 @@
 /* pipe system call for Linux/MIPS */
+/*
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
 
 /*see uClibc's sh/pipe.c and glibc-2.2.4's mips/pipe.S */