[gimp-help-2] quickreference: fix VPATH build.

[Jehan Pagès <jehanp src gnome org>]

commit 3c12128358ba17fdf078860d2edd6ea55c1cddb7
Author: Jehan <jehan girinstud io>
Date:   Sun Jun 11 18:43:46 2017 +0200

    quickreference: fix VPATH build.

 quickreference/Makefile.am |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/quickreference/Makefile.am b/quickreference/Makefile.am
index dd27017..bec7680 100644
--- a/quickreference/Makefile.am
+++ b/quickreference/Makefile.am
@@ -4,7 +4,7 @@ ALL_LINGUAS ?= ca da de el en es fi fr it ja ko nn pl pt_BR ru sl sv zh_CN
 QUICKREFERENCE_ALL_LINGUAS ?= ca da de el en es fi fr it ja ko nn pl pt_BR ru sl sv zh_CN
 QUICKREFERENCE_LINGUAS = $(filter $(ALL_LINGUAS), $(QUICKREFERENCE_ALL_LINGUAS))
 
-POT_FILES = po/gimp-keys.pot
+POT_FILES = $(srcdir)/po/gimp-keys.pot
 
 PO_FILES = $(foreach lang,$(filter-out en,$(QUICKREFERENCE_ALL_LINGUAS)),po/$(lang).po)
 
@@ -26,11 +26,11 @@ EXTRA_DIST = \
 
 COMPENDIUM = Compendium.po
 
-po/gimp-keys.pot: gimp-keys.xml
+$(srcdir)/po/gimp-keys.pot: $(srcdir)/gimp-keys.xml
        @echo Making $@; \
        $(XML2PO) $(XML2POFLAGS) $< | $(MSGUNIQ) --width=$(MSGWIDTH) - > $@
 
-po/%.po: po/gimp-keys.pot
+po/%.po: $(srcdir)/po/gimp-keys.pot
        @echo Making $@; \
        if [ -f $(top_srcdir)/po/$*/$(COMPENDIUM) ]; then \
                with_compendium="--compendium=$(top_srcdir)/po/$*/$(COMPENDIUM)"; \
@@ -46,7 +46,7 @@ pot: po/gimp-keys.pot ;
 po-%: po/%.po ;
 po: $(foreach lang,$(filter-out en,$(QUICKREFERENCE_LINGUAS)),po-$(lang)) ;
 
-xml/gimp-keys-%.xml: po/%.po gimp-keys.xml
+xml/gimp-keys-%.xml: $(srcdir)/po/%.po gimp-keys.xml
        $(MKDIR_P) xml
        $(XML2PO) -p $< $(srcdir)/gimp-keys.xml > $@