Description:
------------
Through a change made between June 09 and June 13, it appears a B/C breaking change in comparison syntax was made.  On PHP 7 builds from June 09 and earlier, the following if statement correctly evaluated:

// $options['driver'] is set to 'sqlite' in the test environment
if ($options['driver'] === 'mysql' && PHP_MAJOR_VERSION >= 7)

As of today, if either condition in this statement evaluates to true it is being interpreted as true and the code inside the conditional being executed.

Test script:
---------------
The snippet above comes from Joomla's 3.5 development branch, specifically the JDatabaseDriver::getInstance() method (https://github.com/joomla/joomla-cms/blob/3.5-dev/libraries/joomla/database/driver.php#L251).  From a Travis-CI build using PHP 7 built on May 25, there is no issue with this method (see https://travis-ci.org/joomla/joomla-cms/jobs/64725678).  With a build from today (see https://travis-ci.org/joomla/joomla-cms/jobs/66699284), there are numerous failures relating to code attempting to fetch a database driver.  Our unit tests are configured to default to a SQLite in-memory database and should not be reaching the MySQL driver.

I also tested with the following modification to getInstance on the current Git build and this change passes without an issue - https://gist.github.com/mbabker/f7f87195b31c597bd92e

Expected result:
----------------
When $options['driver'] === 'sqlite' and executed on a PHP 7 build, this if conditional should evaluate to false:

if ($options['driver'] === 'mysql' && PHP_MAJOR_VERSION >= 7) 

Actual result:
--------------
When $options['driver'] === 'sqlite' and executed on a PHP 7 build, this if conditional is evaluating to true:

if ($options['driver'] === 'mysql' && PHP_MAJOR_VERSION >= 7)