Correct MDSRCS use in <arch>/string/Makefile.inc.

- Remove .c files which duplicate entries in MISRCS.
- Use the same, less merge conflict prone style in all cases.
- Use MDSRCS for mips (.c and .S files both ended up in SRCS).
- Remove pointless sparc64 Makefile.inc.
- Remove uninformative foreign VCS ID entries.

Reviewed by:	emaste, imp, jhb
MFC after:	1 week
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D9841

lib/libc/aarch64/string/Makefile.inc

@@ -6,7 +6,8 @@
 
 .PATH: ${SRCTOP}/contrib/cortex-strings/src/aarch64
 
-MDSRCS+=memchr.S \
+MDSRCS+= \
+	memchr.S \
 	memcmp.S \
 	memcpy.S \
 	memmove.S \

lib/libc/amd64/string/Makefile.inc

@@ -1,4 +1,13 @@
 # $FreeBSD$
 
-MDSRCS+= bcmp.S bcopy.S bzero.S memcmp.S memcpy.S memmove.S memset.S \
-	strcat.S strcmp.S stpcpy.S strcpy.c
+MDSRCS+= \
+	bcmp.S \
+	bcopy.S \
+	bzero.S \
+	memcmp.S \
+	memcpy.S \
+	memmove.S \
+	memset.S \
+	strcat.S \
+	strcmp.S \
+	stpcpy.S

lib/libc/arm/string/Makefile.inc

@@ -1,6 +1,13 @@
-#	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
 # $FreeBSD$
 
-MDSRCS+=bcmp.c bcopy.S bzero.S ffs.S memchr.c memcmp.S memcpy.S \
-	memmove.S memset.S strcat.c strchr.c strcmp.S strcpy.c strlen.S \
-	strncmp.S strrchr.c swab.c wcschr.c wcscmp.c wcslen.c wmemchr.c
+MDSRCS+= \
+	bcopy.S \
+	bzero.S \
+	ffs.S \
+	memcmp.S \
+	memcpy.S \
+	memmove.S \
+	memset.S \
+	strcmp.S \
+	strlen.S \
+	strncmp.S

lib/libc/i386/string/Makefile.inc

@@ -1,6 +1,23 @@
-#	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
 # $FreeBSD$
 
-MDSRCS+=bcmp.S bcopy.S bzero.S ffs.S memchr.S memcmp.S memcpy.S memmove.S \
-	memset.S strcat.S strchr.S strcmp.S strcpy.S strncmp.S strrchr.S \
-	swab.S wcschr.S wcscmp.S wcslen.S wmemchr.S
+MDSRCS+= \
+	bcmp.S \
+	bcopy.S \
+	bzero.S \
+	ffs.S \
+	memchr.S \
+	memcmp.S \
+	memcpy.S \
+	memmove.S \
+	memset.S \
+	strcat.S \
+	strchr.S \
+	strcmp.S \
+	strcpy.S \
+	strncmp.S \
+	strrchr.S \
+	swab.S \
+	wcschr.S \
+	wcscmp.S \
+	wcslen.S \
+	wmemchr.S

lib/libc/mips/string/Makefile.inc

@@ -1,8 +1,13 @@
-#	$NetBSD: Makefile.inc,v 1.2 2000/10/10 21:51:54 jeffs Exp $
 # $FreeBSD$
 
-SRCS+=	bcmp.S bcopy.S bzero.S ffs.S memchr.c memcmp.c memset.c \
-	memcpy.S memmove.S \
-	strcat.c strchr.S strcmp.S strcpy.c strcspn.c strlen.S \
-	strncat.c strncmp.c strncpy.c strrchr.S strpbrk.c strsep.c \
-	strspn.c strstr.c swab.c
+MDSRCS+= \
+	bcmp.S \
+	bcopy.S \
+	bzero.S \
+	ffs.S \
+	memcpy.S \
+	memmove.S \
+	strchr.S \
+	strcmp.S \
+	strlen.S \
+	strrchr.S

lib/libc/sparc64/string/Makefile.inc

@@ -1 +0,0 @@
-# $FreeBSD$