textproc/calibre Qt 5.13 fixes

Unbreak calibre with upcoming Qt 5.13 version. OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/textproc/calibre/Makefile,v
retrieving revision 1.74
diff -u -p -u -p -r1.74 Makefile
--- Makefile 12 Jul 2019 20:49:56 -0000 1.74
+++ Makefile 27 Feb 2020 05:48:13 -0000
@@ -7,7 +7,7 @@ V = 2.85.1
DISTNAME = calibre-$V
CATEGORIES = textproc
EXTRACT_SUFX = .tar.xz
-REVISION = 10
+REVISION = 11

HOMEPAGE = https://calibre-ebook.com/

Index: patches/patch-src_calibre_headless_fontconfig_database_cpp
===================================================================
RCS file: /cvs/ports/textproc/calibre/patches/patch-src_calibre_headless_fontconfig_database_cpp,v
retrieving revision 1.2
diff -u -p -u -p -r1.2 patch-src_calibre_headless_fontconfig_database_cpp
--- patches/patch-src_calibre_headless_fontconfig_database_cpp 10 Aug 2017 04:57:58 -0000 1.2
+++ patches/patch-src_calibre_headless_fontconfig_database_cpp 27 Feb 2020 05:48:13 -0000
@@ -2,6 +2,9 @@ $OpenBSD: patch-src_calibre_headless_fon
Subject: [PATCH] Compatibility with qt5-5.9.0
Commit-Id: 82bd2e1a51df0650cb40894c5dc2b958f601a91d

+Qt 5.11 compatibility
+Commit-Id: 68bbec179abc980ebcb3f13854d2e4fd46f489
+
Index: src/calibre/headless/fontconfig_database.cpp
--- src/calibre/headless/fontconfig_database.cpp.orig
+++ src/calibre/headless/fontconfig_database.cpp
@@ -28,7 +31,29 @@ Index: src/calibre/headless/fontconfig_d