Validate appdata file in %check and fix the validation to pass

This ensures that we fail early, instead of failing during the flatpak
building that checks that the appdata files are valid.

https://gitlab.gnome.org/GNOME/evince/merge_requests/197

evince-appdata-validate-patch

@@ -0,0 +1,27 @@
+From df320fd57d9dae6a4600ddcd795809e495c7ae6b Mon Sep 17 00:00:00 2001
+From: Kalev Lember <klember@redhat.com>
+Date: Mon, 28 Oct 2019 20:03:55 +0100
+Subject: [PATCH] AppData: Fix validation error
+
+Remove the 3.30.3 release from the appdata file to make 'appstream-util
+validate-relax' not error out on the release tag order.
+
+tag-invalid : <release> versions are not in order [3.30.3 before 3.32.0]
+---
+ org.gnome.Evince.appdata.xml.in | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/org.gnome.Evince.appdata.xml.in b/org.gnome.Evince.appdata.xml.in
+index 5f19b3d5..c5aa8989 100644
+--- a/org.gnome.Evince.appdata.xml.in
++++ b/org.gnome.Evince.appdata.xml.in
+@@ -110,6 +110,5 @@
+     </release>
+     <release version="3.32.1" date="2019-09-29" />
+     <release version="3.32.0" date="2019-03-14" />
+-    <release version="3.30.3" date="2019-09-29" />
+   </releases>
+ </component>
+-- 
+2.23.0
+

evince.spec

@@ -15,6 +15,8 @@ Source0:        https://download.gnome.org/sources/%{name}/3.34/%{name}-%{versio
 
 # https://bugzilla.gnome.org/show_bug.cgi?id=766749
 Patch0:         0001-Resolves-deb-762530-rhbz-1061177-add-man-pages.patch
+# https://gitlab.gnome.org/GNOME/evince/merge_requests/197
+Patch1:         evince-appdata-validate-patch
 
 # https://bugzilla.redhat.com/show_bug.cgi?id=1753830
 Patch1:         evince-text-drag.patch
@@ -173,6 +175,7 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 rm -f $RPM_BUILD_ROOT%{_libdir}/*.a
 
 %check
+appstream-util validate-relax --nonet $RPM_BUILD_ROOT%{_datadir}/metainfo/org.gnome.Evince.appdata.xml
 desktop-file-validate $RPM_BUILD_ROOT%{_datadir}/applications/org.gnome.Evince.desktop
 desktop-file-validate $RPM_BUILD_ROOT%{_datadir}/applications/org.gnome.Evince-previewer.desktop