Configure: additional test for ExtUtils::Embed perl module presence.
Configure: additional test for ExtUtils::Embed perl module presence.

Now perl configure will correctly fail if ExtUtils::Embed perl module
is not present in the system (found on Amazon Linux AMI, as of
release 2012.03).

hy0kl/nginx,firebase/nginx,hy0kl/nginx,firebase/nginx,hy0kl/nginx,firebase/nginx,firebase/nginx