mupdf: adopt post-release bugfix-patches from upstream

pkgs/applications/misc/mupdf/default.nix

···
   };
 
   patches =
-    stdenv.lib.optional stdenv.isDarwin ./darwin.patch
-  ;
+    stdenv.lib.optional stdenv.isDarwin ./darwin.patch ++ [
+    (fetchpatch {
+        name = "pdfocr.patch";
+        url = "http://git.ghostscript.com/?p=mupdf.git;a=patch;h=a507b139adf37d2c742e039815601cdc2aa00a84";
+        sha256 = "1fx6pdgwrbk3bqsx53764d61llfj9s5q8lxqkna7mjnp7mg4krj3";
+      })
+    (fetchpatch {
+        name = "pdf-layer.patch";
+        url = "http://git.ghostscript.com/?p=mupdf.git;a=patch;h=b82e9b6d6b46877e5c3763cc3bc641c66fa7eb54";
+        sha256 = "0ma8jq8d9a0mf26qjklgi4gdaflpjik1br1nhafzvjz7ccl56ksm";
+      })
+    (fetchpatch {
+        name = "pixmap.patch";
+        url = "http://git.ghostscript.com/?p=mupdf.git;a=patch;h=32e4e8b4bcbacbf92af7c88337efae21986d9603";
+        sha256 = "1zqkxgwrhcwsdya98pcmpq2815jjmv3fwsp0sba9f5nq5xi6whbj";
+      })
+    ];
 
   postPatch = ''
     sed -i "s/__OPENJPEG__VERSION__/${openJpegVersion}/" source/fitz/load-jpx.c