Rename sbin/ifconfig/Makefile.inc to Makefile.common; the former can

potentially conflict with bsd.subdir.mk.

distrib/utils/x_ifconfig/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.34 2017/02/07 16:49:40 rin Exp $
+# $NetBSD: Makefile,v 1.35 2017/02/08 23:16:41 rin Exp $
 # Build a smaller ifconfig (i.e. for boot media)
 
 NOMAN=	# defined
@@ -19,7 +19,7 @@ CPPFLAGS+=-DSMALL
 .endif
 
 PROG=	ifconfig
-.include "${.CURDIR}/../../../sbin/ifconfig/Makefile.inc"
+.include "${.CURDIR}/../../../sbin/ifconfig/Makefile.common"
 
 .include <bsd.prog.mk>
 

sbin/ifconfig/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.57 2017/02/08 23:14:00 rin Exp $
+#	$NetBSD: Makefile,v 1.58 2017/02/08 23:16:41 rin Exp $
 #	@(#)Makefile	8.1 (Berkeley) 6/5/93
 
 # when making a change to this file, please check if the change is
@@ -17,7 +17,7 @@ CPPFLAGS+=	-DINET6
 SRCS+= af_inet6.c
 .endif
 
-.include "Makefile.inc"
+.include "Makefile.common"
 
 .PATH:		${.CURDIR}/../../lib/libc/net
 RUMPSRCS= getifaddrs.c getnameinfo.c if_indextoname.c

sbin/ifconfig/Makefile.common

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.inc,v 1.9 2012/10/31 10:17:34 msaitoh Exp $
+#	$NetBSD: Makefile.common,v 1.1 2017/02/08 23:16:41 rin Exp $
 
 # shared stuff with src/distrib/utils/x_ifconfig for install media.
 # stuff not required by install media should be into Makefile.