[gtk+] gdk/broadway/toarray.pl: Don't hard-code the path of perl

[Ting-Wei Lan <lantw src gnome org>]

commit 5f8e2fcf935dafd72023a72967b30dc6765541aa
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Mon Dec 25 00:24:04 2017 +0800

    gdk/broadway/toarray.pl: Don't hard-code the path of perl
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791927

 gdk/broadway/toarray.pl |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gdk/broadway/toarray.pl b/gdk/broadway/toarray.pl
index ac8b5ff..642ea8a 100755
--- a/gdk/broadway/toarray.pl
+++ b/gdk/broadway/toarray.pl
@@ -1,4 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
+
+use warnings;
 
 my $ARRAYNAME = $ARGV[0];
 my $first = 0;