gtk-doc: correct the style.css permissions

style.css was set to write-only during build which means it wasn't actually
installed or packaged (with only webkitgtk producing a build failure!),
which in turn means generated documentation was broken.

(From OE-Core rev: 946516f5312edaa62fd20162d8c7596f77e9ca64)

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

meta/recipes-gnome/gtk-doc/files/0001-highlight.py-correctly-set-permissions-on-file-to-be.patch

@@ -0,0 +1,23 @@
+From 63bc4cd1ce2d918c6566a4e0c7d830713432fc82 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Fri, 28 Jun 2019 13:08:24 +0200
+Subject: [PATCH] highlight.py: correctly set permissions on file to be written
+
+Upstream-Status: Backport [https://github.com/GNOME/gtk-doc/commit/12d9a698fb58f3d1a840d3bfc0d15a3a9f57afc1]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ gtkdoc/highlight.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gtkdoc/highlight.py b/gtkdoc/highlight.py
+index 8f6e470..82e11e8 100644
+--- a/gtkdoc/highlight.py
++++ b/gtkdoc/highlight.py
+@@ -47,6 +47,6 @@ def highlight_code(code, lang='c'):
+ 
+ 
+ def append_style_defs(css_file_name):
+-    os.chmod(css_file_name, stat.S_IWRITE)
++    os.chmod(css_file_name, 0o644)
+     with open(css_file_name, 'at', newline='\n', encoding='utf-8') as css:
+         css.write(HTML_FORMATTER.get_style_defs())

meta/recipes-gnome/gtk-doc/files/pkg-config-native.patch

@@ -1,4 +1,4 @@
-From a3f69f2ed45efbdaee47c2dde4df3d78323300e5 Mon Sep 17 00:00:00 2001
+From 31254fac614bb6ee28cf6fdd514a9563a5d781a8 Mon Sep 17 00:00:00 2001
 From: Ross Burton <ross.burton@intel.com>
 Date: Mon, 5 Sep 2016 22:25:44 +0100
 Subject: [PATCH] Use native pkg-config when looking for gtk-doc.

meta/recipes-gnome/gtk-doc/gtk-doc_1.30.bb

@@ -24,6 +24,7 @@ SRC_URI += "file://0001-Do-not-hardocode-paths-to-perl-python-in-scripts.patch \
            file://0001-Do-not-error-out-if-xsltproc-is-not-found.patch \
            file://conditionaltests.patch \
            file://no-clobber.patch \
+           file://0001-highlight.py-correctly-set-permissions-on-file-to-be.patch \
            "
 SRC_URI_append_class-native = " file://pkg-config-native.patch"