Solaris specific changes for compiling

--- polkit-0.113/test/mocklibc/src/netdb.c~	2014-01-14 14:42:25.000000000 -0800
+++ polkit-0.113/test/mocklibc/src/netdb.c	2015-10-03 17:14:18.150116510 -0700
@@ -51,7 +51,11 @@
   return 1;
 }
 
+#ifdef __sun
+int endnetgrent(void) {
+#else
 void endnetgrent(void) {
+#endif
   netgroup_free_all(global_netgroup_head);
   global_netgroup_head = NULL;
 }