[gimp] plug-ins: fix VPATH build.

[Jehan <jehanp src gnome org>]

commit a7a7cd771094a8141ec13262c02782295f6a5ace
Author: Jehan <jehan girinstud io>
Date:   Sun Jul 21 13:15:14 2019 +0200

    plug-ins: fix VPATH build.
    
    XML files need to be found by the tools when the build is out of the
    source tree.

 plug-ins/gfig/images/Makefile.am     | 4 ++--
 plug-ins/lighting/images/Makefile.am | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/plug-ins/gfig/images/Makefile.am b/plug-ins/gfig/images/Makefile.am
index adf31e4674..1288d03d68 100644
--- a/plug-ins/gfig/images/Makefile.am
+++ b/plug-ins/gfig/images/Makefile.am
@@ -31,9 +31,9 @@ CLEANFILES = $(noinst_DATA)
 gfig-icon-images.h: gfig-icon-images.gresource.xml
        $(AM_V_GEN) $(HOST_GLIB_COMPILE_RESOURCES) \
          --sourcedir=$(srcdir) --generate-header \
-         --target=$@ gfig-icon-images.gresource.xml
+         --target=$@ $(srcdir)/gfig-icon-images.gresource.xml
 
 gfig-icon-images.c: gfig-icon-images.h
        $(AM_V_GEN) $(HOST_GLIB_COMPILE_RESOURCES) \
          --sourcedir=$(srcdir) --generate-source \
-         --target=$@ gfig-icon-images.gresource.xml
+         --target=$@ $(srcdir)/gfig-icon-images.gresource.xml
diff --git a/plug-ins/lighting/images/Makefile.am b/plug-ins/lighting/images/Makefile.am
index c2fd813a3e..9fa1d65e10 100644
--- a/plug-ins/lighting/images/Makefile.am
+++ b/plug-ins/lighting/images/Makefile.am
@@ -25,9 +25,9 @@ CLEANFILES = $(noinst_DATA)
 lighting-icon-images.h: lighting-icon-images.gresource.xml
        $(AM_V_GEN) $(HOST_GLIB_COMPILE_RESOURCES) \
          --sourcedir=$(srcdir) --generate-header \
-         --target=$@ lighting-icon-images.gresource.xml
+         --target=$@ $(srcdir)/lighting-icon-images.gresource.xml
 
 lighting-icon-images.c: lighting-icon-images.h
        $(AM_V_GEN) $(HOST_GLIB_COMPILE_RESOURCES) \
          --sourcedir=$(srcdir) --generate-source \
-         --target=$@ lighting-icon-images.gresource.xml
+         --target=$@ $(srcdir)/lighting-icon-images.gresource.xml