gstdoc-scangobj: use /usr/bin/env perl instead of hard-coding /usr/bin/perl

Should help the OSX build bot use the right perl version.

diff --git a/gstdoc-scangobj b/gstdoc-scangobj
index ae28779..ded21f8 100755 (executable)
--- a/gstdoc-scangobj
+++ b/gstdoc-scangobj
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # -*- cperl -*-
 #
 # gtk-doc - GTK DocBook documentation generator.