[shotwell] build: Fix parallel build

[Jens Georg <jensgeorg src gnome org>]

commit 310e538290fa16cab84be46ca6d5737cb4bbcfd6
Author: Jens Georg <mail jensge org>
Date:   Sat Jul 2 01:20:20 2016 +0200

    build: Fix parallel build
    
    Signed-off-by: Jens Georg <mail jensge org>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=768054

 Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index e529a2d..d62dcc9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -43,7 +43,7 @@ plugins_common_libshotwell_plugin_common_la_SOURCES = \
        plugins/common/Resources.vala \
        plugins/shotwell-plugin-dev-1.0.vapi
 
-$(top_srcdir)/plugins/shotwell-plugin-common.vapi: \
+$(top_srcdir)/plugins/shotwell-plugin-common.vapi plugins/shotwell-plugin-common.h: \
        plugins_common_libshotwell_plugin_common_la_vala.stamp
 
 plugins_common_libshotwell_plugin_common_la_VALAFLAGS = \
@@ -63,7 +63,7 @@ plugins_common_libshotwell_plugin_common_la_CFLAGS = \
        -DGETTEXT_PACKAGE='"$(GETTEXT_PACKAGE)"' \
        -I $(top_srcdir)/plugins -I$(top_builddir)/plugins
 
-plugins/shotwell-plugin-dev-1.0.vapi: src_plugins_libplugin_la_vala.stamp
+plugins/shotwell-plugin-dev-1.0.vapi plugins/shotwell-plugin-dev-1.0.h: src_plugins_libplugin_la_vala.stamp
 
 #
 # Create intermediate library for the Plugin API