gnu: nginx: Add --with-compat to the configure flags.

To match the change to nginx-accept-language-module made in
cd15d417e3, as the lack of --with-compat seemed
to cause a "binary compatible" error when trying to use this module with
NGinx.

* gnu/packages/web.scm (nginx)[arguments]: Add --with-compat to
 #:configure-flags.

Change-Id: I50831aef84e845c3cdfc2d6e0f4ba9b6f0dc80d1

gnu/packages/web.scm

@@ -533,6 +533,7 @@ the same, being completely separated from the Internet.")
               "--with-http_sub_module"
               "--with-pcre-jit"
               "--with-debug"
+              "--with-compat"
               "--with-stream"
               "--with-stream_ssl_module"
               "--with-http_stub_status_module"