perlPackages.WWWCurl: fix build due to curl 5.10.3

The define CURL_STRICTER is only set if CURL_NO_OLDIES is set, but that breaks
compatibility with this package. Defining CURL_STRICTER is enough to fix the
build.

pkgs/top-level/perl-packages.nix

@@ -14167,6 +14167,7 @@ let self = _self // overrides; _self = with self; {
         substituteInPlace Makefile.PL --replace '"cpp"' '"gcc -E"'
         substituteInPlace Makefile.PL --replace '_LASTENTRY\z' '_LASTENTRY\z|CURL_DID_MEMORY_FUNC_TYPEDEFS\z'
       '';
+    NIX_CFLAGS_COMPILE = "-DCURL_STRICTER";
     doCheck = false; # performs network access
   };