dl01, dl02, dl05: Fix unresolved printf symbol

The link time wrap of printf leads to unresolved symbols in the loadable
modules.  This resulted in infinite loops and test timeouts.  Use
rtems_printf() for output.

Update #3199.

testsuites/libtests/dl01/dl-o1.c

@@ -6,14 +6,13 @@
  * http://www.rtems.org/license/LICENSE.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-
 /**
  * Hello World as a loadable module.
  */
 
-#include <stdio.h>
+#include <rtems/test.h>
+
+#define printf(...) rtems_printf(&rtems_test_printer, __VA_ARGS__);
 
 /*
  * Yes a decl in the source. This is a modules main and I could not find which

testsuites/libtests/dl02/dl-o1.c

@@ -6,12 +6,13 @@
  * http://www.rtems.org/license/LICENSE.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
+#include "dl-o2.h"
 
 #include <dlfcn.h>
 
-#include "dl-o2.h"
+#include <rtems/test.h>
+
+#define printf(...) rtems_printf(&rtems_test_printer, __VA_ARGS__);
 
 typedef int (*func1_t)(int argc, const char* argv[]);
 

testsuites/libtests/dl02/dl-o2.c

@@ -6,10 +6,12 @@
  * http://www.rtems.org/license/LICENSE.
  */
 
-#include <stdio.h>
-
 #include "dl-o2.h"
 
+#include <rtems/test.h>
+
+#define printf(...) rtems_printf(&rtems_test_printer, __VA_ARGS__);
+
 int dl_o2_func1 (int argc, char* argv[])
 {
   int arg;

testsuites/libtests/dl05/dl-o5.cpp

@@ -1,6 +1,11 @@
-#include <cstdio>
-#include <stdexcept>
 #include "dl-load.h" /* make the symbol a C linkage */
+
+#include <stdexcept>
+
+#include <rtems/test.h>
+
+#define printf(...) rtems_printf(&rtems_test_printer, __VA_ARGS__);
+
 void exception_dl(bool throw_runtime)
 {
   printf("exception_dl: begin\n");