Add <cstring> and/or <cstdlib> to support modern gcc

Four of these five patches should have been part of the previous
commit but I didn't notice them.  The ampasCTL pach is to fix a
regression that I introduced by removing part of the post-patch
target.

Approved by:	gcc5 support blanket

converters/fix-mime-charset/files/patch-src_input.cc

@@ -0,0 +1,10 @@
+--- src/input.cc.orig	2003-07-29 23:29:11 UTC
++++ src/input.cc
+@@ -3,6 +3,7 @@
+ #include "input.h"
+ #include <iostream>
+ #include <fstream>
++#include <cstring>
+ 
+ /* Input */
+ 

graphics/ampasCTL/files/patch-lib__dpx__dpx_util.cc

@@ -1,8 +1,10 @@
---- ./lib/dpx/dpx_util.cc.orig	2013-10-12 18:55:34.000000000 +0200
+--- lib/dpx/dpx_util.cc.orig	2014-06-03 01:11:24 UTC
-+++ ./lib/dpx/dpx_util.cc	2013-10-12 18:55:55.000000000 +0200
++++ lib/dpx/dpx_util.cc
-@@ -57,6 +57,7 @@
+@@ -55,8 +55,8 @@
+ #include "dpx_util.hh"
+ #include <stdarg.h>
  #include <stdio.h>
- 
+-#include <alloca.h>
  #include <string.h>
 +#include <stdlib.h>
  

graphics/graphopt/files/patch-src_classes_optFileWriter.cc

@@ -0,0 +1,9 @@
+--- src/classes/optFileWriter.cc.intermediate	2015-09-20 01:43:24 UTC
++++ src/classes/optFileWriter.cc
+@@ -1,5 +1,6 @@
+ #include "optFileWriter.h"
+ #include <cstdlib>
++#include <cstring>
+ 
+ 
+ optFileWriter::optFileWriter(char *what_file, nodes *what_nodes) {

graphics/graphopt/files/patch-src_classes_psExporter.cc

@@ -0,0 +1,10 @@
+--- src/classes/psExporter.cc.intermediate	2015-09-20 01:43:24 UTC
++++ src/classes/psExporter.cc
+@@ -1,6 +1,6 @@
+ #include "psExporter.h"
+ #include <cstdlib>
+-
++#include <cstring>
+ 
+ psExporter::psExporter(char *what_file, nodes *what_nodes) {
+    filename = strdup(what_file);

graphics/graphopt/files/patch-src_classes_visioExporter.cc

@@ -0,0 +1,9 @@
+--- src/classes/visioExporter.cc.intermediate	2015-09-20 01:43:24 UTC
++++ src/classes/visioExporter.cc
+@@ -1,5 +1,6 @@
+ #include "visioExporter.h"
+ #include <cstdlib>
++#include <cstring>
+ 
+ 
+ visioExporter::visioExporter(char *what_file, nodes *what_nodes) {