added libev files

libev/update_ev_wrap

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+(
+   echo '#define VAR(name,decl) name'
+   echo '#define EV_GENWRAP 1'
+   cat ev_vars.h
+) | cc -E -o - - | perl -ne '
+   while (<>) {
+      push @syms, $1 if /(^\w+)/;
+   }
+   print "/* DO NOT EDIT, automatically generated by update_ev_wrap */\n",
+         "#ifndef EV_WRAP_H\n",
+         "#define EV_WRAP_H\n",
+         (map "#define $_ ((loop)->$_)\n", sort @syms),
+         "#else\n",
+         "#undef EV_WRAP_H\n",
+         (map "#undef $_\n", sort @syms),
+         "#endif\n";
+' >ev_wrap.h