Fix qw syntax error

[mbfisher]

Fixes syntax error:

urxvt: perl hook 0 evaluation error: /usr/lib/urxvt/perl/tabbedex: syntax error at /usr/lib/urxvt/perl/tabbedex line 669, near "$hook qw(start destroy user_command key_press property_notify add_lines)"
syntax error at /usr/lib/urxvt/perl/tabbedex line 681, near "}

}"

[tbranyen]

@stepb What causes this issue in the first place? Perl update?

[professorjamesmoriarty]

@tbranyen If I'm not mistaken around perl 5.18 (the version may be wrong) there was a syntax change and slight issue caused. It's a simple fix for the most part.

[mina86]

By the way, this is duplicate of #23