Add more headers that are required with -fno-builtin (stdlib and strings)

svn path=/head/; revision=78469

bin/cp/cp.c

@@ -71,6 +71,7 @@ static const char rcsid[] =
 #include <fts.h>
 #include <limits.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 

bin/cp/utils.c

@@ -52,6 +52,7 @@ static const char rcsid[] =
 #include <fts.h>
 #include <limits.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sysexits.h>
 #include <unistd.h>
 

bin/dd/misc.c

@@ -48,6 +48,8 @@ static const char rcsid[] =
 
 #include <errno.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
 #include <unistd.h>
 
 #include "dd.h"

bin/sh/mail.c

@@ -54,6 +54,7 @@ static const char rcsid[] =
 #include "error.h"
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <stdlib.h>
 
 
 #define MAXMBOXES 10

bin/sh/mksyntax.c

@@ -53,6 +53,7 @@ static const char rcsid[] =
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "parser.h"