[gdk-pixbuf] Update po/Makevars

[Piotr Drąg <piotrdrag src gnome org>]

commit 2f1d5db7bcb5819fea856a410455b34c2b7b6b4f
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Apr 27 16:34:17 2017 +0200

    Update po/Makevars
    
    This is not a GNU package and the Free Software Foundation has no copyright
    over it. Also adds MSGID_BUGS_ADDRESS.

 po/Makevars |   36 +++++++++++++++++++++++++++++++-----
 1 files changed, 31 insertions(+), 5 deletions(-)
---
diff --git a/po/Makevars b/po/Makevars
index eed6382..c357b50 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -36,7 +36,14 @@ XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ \
 # or entity, or to disclaim their copyright.  The empty string stands for
 # the public domain; in this case the translators are expected to disclaim
 # their copyright.
-COPYRIGHT_HOLDER = Free Software Foundation, Inc.
+COPYRIGHT_HOLDER = gdk-pixbuf contributors
+
+# This tells whether or not to prepend "GNU " prefix to the package
+# name that gets inserted into the header of the $(DOMAIN).pot file.
+# Possible values are "yes", "no", or empty.  If it is empty, try to
+# detect it automatically by scanning the files in $(top_srcdir) for
+# "GNU packagename" string.
+PACKAGE_GNU = no
 
 # This is the email address or URL to which the translators shall report
 # bugs in the untranslated strings:
@@ -52,15 +59,34 @@ COPYRIGHT_HOLDER = Free Software Foundation, Inc.
 # It can be your email address, or a mailing list address where translators
 # can write to without being subscribed, or the URL of a web page through
 # which the translators can contact you.
-MSGID_BUGS_ADDRESS =
+MSGID_BUGS_ADDRESS = 
https://bugzilla.gnome.org/enter_bug.cgi?product=gdk-pixbuf&keywords=I18N+L10N&component=general
 
 # This is the list of locale categories, beyond LC_MESSAGES, for which the
 # message catalogs shall be used.  It is usually empty.
 EXTRA_LOCALE_CATEGORIES =
 
-# Ignore the timestamp of the .pot file, as git clones do not have
-# deterministic timestamps, and .po files are updated by translators
-# (only) in GNOME projects.
+# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'
+# context.  Possible values are "yes" and "no".  Set this to yes if the
+# package uses functions taking also a message context, like pgettext(), or
+# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
+USE_MSGCTXT = yes
+
+# These options get passed to msgmerge.
+# Useful options are in particular:
+#   --previous            to keep previous msgids of translated messages,
+#   --quiet               to reduce the verbosity.
+MSGMERGE_OPTIONS =
+
+# These options get passed to msginit.
+# If you want to disable line wrapping when writing PO files, add
+# --no-wrap to MSGMERGE_OPTIONS, XGETTEXT_OPTIONS, and
+# MSGINIT_OPTIONS.
+MSGINIT_OPTIONS =
+
+# This tells whether or not to regenerate a PO file when $(DOMAIN).pot
+# has changed.  Possible values are "yes" and "no".  Set this to no if
+# the POT file is checked in the repository and the version control
+# program ignores timestamps.
 PO_DEPENDS_ON_POT = no
 
 # This tells whether or not to forcibly update $(DOMAIN).pot and