Libraries updates and cleanup

* Updating common/lib
 * Updating lib/csu
 * Updating lib/libc
 * Updating libexec/ld.elf_so
 * Corrected test on __minix in featuretest to actually follow the
   meaning of the comment.
 * Cleaned up _REENTRANT-related defintions.
 * Disabled -D_REENTRANT for libfetch
 * Removing some unneeded __NBSD_LIBC defines and tests

Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2

common/lib/libc/arch/sh3/string/ffs.S

@@ -1,4 +1,4 @@
-/*	$NetBSD: ffs.S,v 1.2 2008/04/28 20:22:52 martin Exp $	*/
+/*	$NetBSD: ffs.S,v 1.3 2011/07/04 12:18:05 mrg Exp $	*/
 
 /*-
  * Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
 #include <machine/asm.h>
 
 #if defined(LIBC_SCCS) && !defined(lint)
-	RCSID("$NetBSD: ffs.S,v 1.2 2008/04/28 20:22:52 martin Exp $")
+	RCSID("$NetBSD: ffs.S,v 1.3 2011/07/04 12:18:05 mrg Exp $")
 #endif
 
 /*
@@ -42,6 +42,7 @@
  * The remaining 8bit is tested in every 2bit.
  */
 
+WEAK_ALIAS(__ffssi2,ffs)
 ENTRY(ffs)
 	mov	r4,r0		! using r0 specific instructions
 	tst	#0xff,r0