[gexiv2] Fix vapi when building from dist tarball

[Jens Georg <jensgeorg src gnome org>]

commit ca930c356beb1aaa8df7d5f6cf23ebaeaa5d212e
Author: Jens Georg <mail jensge org>
Date:   Wed Nov 30 00:01:05 2016 +0100

    Fix vapi when building from dist tarball
    
    Signed-off-by: Jens Georg <mail jensge org>

 Makefile.am |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 5c0ad92..fb43680 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -47,18 +47,17 @@ endif
 vapi: gexiv2.vapi
 
 if ENABLE_VAPIGEN
-gexiv2.vapi: gexiv2_vapi.stamp
-       @true
-
 gexiv2_vapi.stamp: $(top_builddir)/GExiv2-0.10.gir $(abs_top_srcdir)/vapi/GExiv2-0.10.metadata 
$(abs_top_srcdir)/vapi/gexiv2-custom.vala
        rm -f $(@F)
        $(AM_V_GEN)$(VAPIGEN) --metadatadir=$(abs_top_srcdir)/vapi \
                              --library=gexiv2 \
                              $(top_builddir)/GExiv2-0.10.gir $(abs_top_srcdir)/vapi/gexiv2-custom.vala
        echo timestmap > $(@F)
-DISTCLEANFILES = gexiv2.vapi gexiv2_vapi.stamp
 endif
 
+gexiv2.vapi: gexiv2_vapi.stamp
+       @true
+
 dist_vapi_DATA = gexiv2.vapi
 EXTRA_DIST += $(top_srcdir)/vapi/GExiv2-0.10.metadata gexiv2.vapi gexiv2_vapi.stamp 
$(top_srcdir)/vapi/gexiv2-custom.vala