Update git address to https from git

To recover https://app.travis-ci.com/github/travis-ci/php-src-builder/jobs/563666630#L4003

Author: mustafa-travisci

bin/compile-extension-amqp

@@ -7,7 +7,7 @@ travis_time_start
 
 sudo apt-get install -y librabbitmq-dev
 
-git clone git://github.com/alanxz/rabbitmq-c.git
+git clone https://github.com/alanxz/rabbitmq-c.git
 pushd rabbitmq-c
 git submodule init
 git submodule update