[gexiv2] build: Make --disable-vala work

[Jens Georg <jensgeorg src gnome org>]

commit 5b55914be1f2a656998a0c25ade37d706bda6851
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Sep 8 19:32:26 2017 +0200

    build: Make --disable-vala work
    
    All Vala related activity and artifacts should be encapsulated within
    ENABLE_VAPIGEN.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787455

 Makefile.am |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index f11433a..2c87482 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,6 +2,8 @@ ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 
 SUBDIRS = . docs
 
+CLEANFILES =
+
 # Installation directories.
 pkgconfigdir     = $(libdir)/pkgconfig
 GEXIV2_publicdir = $(includedir)/gexiv2
@@ -21,7 +23,6 @@ DISTCHECK_CONFIGURE_FLAGS = \
 EXTRA_DIST = \
        @PACKAGE_NAME  pc in    \
        GExiv2.py                               \
-       @PACKAGE_NAME@.vapi             \
        gexiv2/gexiv2-version.m4 \
        $(TYPELIB_FILES) \
        test/data/sample-author-badencoding.jpg \
@@ -74,24 +75,24 @@ py3gi_DATA      = GExiv2.py
 endif
 endif
 
+if ENABLE_VAPIGEN
 vapi: gexiv2.vapi
 
-if ENABLE_VAPIGEN
 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)
-endif
 
 gexiv2.vapi: gexiv2_vapi.stamp
        @true
 
-CLEANFILES = gexiv2.vapi gexiv2_vapi.stamp
+CLEANFILES += gexiv2.vapi gexiv2_vapi.stamp
 
 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
+endif
 
 GEXIV2_GIRHEADERS = \
        $(srcdir)/gexiv2/gexiv2.h \