Wrong `tech/bemdecl-*` output format fix

Without this fix `tech/bemdecl-*` output has the same format as in `deps.js`-files (should be different).

Was: 

    // project.bemdecl.js, incorrect
    exports.deps = [
        { block: 'input' },
        { block: 'input', mod: 'type', val: 'textarea' }
    ];

With this fix:

    // project.bemdecl.js, correct
    exports.blocks = [
        {
            name: 'input',
            mods: [
                { 
                    name: 'type',
                    vals: [
                        { name: 'textarea' }
                    ]
                }
            ]
        }
    ];