libpsl: fix the gtk-doc 1.30 build

(From OE-Core rev: 5f672c0f80f5486016e2899bb6d3f5bbc7b5c74a)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/libpsl/libpsl/0001-gtk-doc-do-not-include-tree_index.sgml.patch

@@ -0,0 +1,28 @@
+From 8691105e1808ec9b031b6c25f70204a0908ae9c1 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Sat, 1 Jun 2019 13:09:41 +0200
+Subject: [PATCH] gtk-doc: do not include tree_index.sgml
+
+gtk-doc 1.30 no longer generates the file if the object tree is empty
+
+Upstream-Status: Submitted [https://github.com/rockdaboot/libpsl/pull/137]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ docs/libpsl/libpsl-docs.sgml | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/docs/libpsl/libpsl-docs.sgml b/docs/libpsl/libpsl-docs.sgml
+index 1eca9a2..1c38dbc 100644
+--- a/docs/libpsl/libpsl-docs.sgml
++++ b/docs/libpsl/libpsl-docs.sgml
+@@ -22,10 +22,6 @@
+         </para>
+         <xi:include href="xml/libpsl.xml"/>
+   </chapter>
+-  <chapter id="object-tree">
+-    <title>Object Hierarchy</title>
+-     <xi:include href="xml/tree_index.sgml"/>
+-  </chapter>
+   <index id="api-index-full">
+     <title>API Index</title>
+     <xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>

meta/recipes-support/libpsl/libpsl_0.21.0.bb

@@ -4,7 +4,9 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=5437030d9e4fbe7267ced058ddb8a7f5 \
                     file://COPYING;md5=f41d10997a12da5ee3c24ceeb0148d18"
 
-SRC_URI = "https://github.com/rockdaboot/${BPN}/releases/download/${BP}/${BP}.tar.gz"
+SRC_URI = "https://github.com/rockdaboot/${BPN}/releases/download/${BP}/${BP}.tar.gz \
+           file://0001-gtk-doc-do-not-include-tree_index.sgml.patch \
+           "
 SRC_URI[md5sum] = "171e96d887709e36a57f4ee627bf82d2"
 SRC_URI[sha256sum] = "41bd1c75a375b85c337b59783f5deb93dbb443fb0a52d257f403df7bd653ee12"