Replace missing headers

This commit was SVN r21136.

opal/mca/pstat/darwin/pstat_darwin_module.c

@@ -33,6 +33,7 @@
 #include <sys/sysctl.h>
 #include <assert.h>
 #include <time.h>
+#include <string.h>
 
 #include "opal/mca/base/mca_base_param.h"
 #include "opal/mca/pstat/pstat.h"

test/datatype/ddt_lib.c

@@ -27,6 +27,7 @@
 #include <sys/time.h>
 #endif
 #include <stdio.h>
+#include <string.h>
 
 #define TIMER_DATA_TYPE struct timeval
 #define GET_TIME(TV)   gettimeofday( &(TV), NULL )

test/datatype/ddt_test.c

@@ -27,6 +27,7 @@
 #include <sys/time.h>
 #endif
 #include <stdio.h>
+#include <string.h>
 
 /* Compile with:
 mpicc -DHAVE_CONFIG_H -I. -I../../include -I../../../ompi-trunk/include  -I../.. -I../../include -I../../../ompi-trunk/opal -I../../../ompi-trunk/orte -I../../../ompi-trunk/ompi -g ddt_test.c -o ddt_test

test/dss/dss_buffer.c

@@ -26,6 +26,7 @@
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
+#include <string.h>
 
 #include "opal/runtime/opal.h"
 #include "opal/dss/dss.h"