.jshintrc

packaging: fix "make centos{5,6,7}"

Without this change, make centos{5,6,7} fails with error:
    cp: cannot stat '<basedir>/rpmbuild/RPMS/*/*': No such file or directory

This change is the exact equivalent of bc4bbc42899a (which applied to Fedora).

{
    // Enforcing
    "eqeqeq"        : true,     // true: Require triple equals (===) for comparison
    "forin"         : true,     // true: Require filtering for..in loops with obj.hasOwnProperty()
    "freeze"        : true,     // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
    "nonbsp"        : true,     // true: Prohibit "non-breaking whitespace" characters.
    "undef"         : true,     // true: Require all non-global variables to be declared (prevents global leaks)

    // Environments
    "browser"       : true      // Web Browser (window, document, etc)
}