Fix build with perl 5.25.11 and later.
https://rt.cpan.org/Public/Bug/Display.html?id=122110
--- Makefile.PL.orig	2017-07-03 05:27:58.000000000 -0700
+++ Makefile.PL	2017-07-03 05:28:33.000000000 -0700
@@ -1,6 +1,7 @@
 # Makefile.PL for Perl module WWW::Curl
 # Check out the README file for more information.
 
+use lib '.';
 use inc::Module::Install;
 
 name			'WWW-Curl';