refs #5368 add some benign includes and change one errno usage for portability

git-svn-id: file:///svn/toku/tokudb@48330 c7de825b-a66e-492c-adef-691d508d4ae1

buildheader/make_tdb.cc

@@ -12,6 +12,7 @@
 // Don't include toku_assert.h.   Just use assert.h
 #include <assert.h>
 #include <string.h>
+#include <sys/types.h>
 
 #define VISIBLE "__attribute__((__visibility__(\"default\")))"
 

ft/ftdump.cc

@@ -7,7 +7,9 @@
 /* Tell me the diff between two brt files. */
 
 #include "includes.h"
+#include <stdlib.h>
 #include <inttypes.h>
+#include <limits.h>
 
 static void
 format_time(const uint64_t time_int, char *buf) {

src/ydb.cc

@@ -2089,7 +2089,7 @@ toku_maybe_get_engine_status_text (char * buff, int buffsize) {
         r = env_get_engine_status_text(env, buff, buffsize);
     }
     else {
-        r = ENODATA;
+        r = EOPNOTSUPP;
         snprintf(buff, buffsize, "Engine status not available: disabled by user.  This should only happen in test programs.\n");
     }
     return r;