Report getaddrinfo failures correctly.

Also move us off the "convenience" function because you can't get useful
error reporting from it.

Change-Id: I5fcc6a6d762f5f60906980a7835f01a35045be65
diff --git a/jdwp_service.cpp b/jdwp_service.cpp
index a2e0f88..06e7780 100644
--- a/jdwp_service.cpp
+++ b/jdwp_service.cpp
@@ -22,6 +22,7 @@
 
 #include <errno.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>