Make it possible to build MuPDF with OpenJPEG 2.1, which is the latest
release series and contains many important bug fixes.

Patch adapted from Debian:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=745246

And related to this upstream commit:

http://git.ghostscript.com/?p=mupdf.git;a=commit;h=f88bfe2e62dbadb96d4f52d7aa025f0a516078da

diff --git a/source/fitz/load-jpx.c b/source/fitz/load-jpx.c
index 6b92e5c..72dea50 100644
--- a/source/fitz/load-jpx.c
+++ b/source/fitz/load-jpx.c
@@ -444,11 +444,6 @@
 
 #else /* HAVE_LURATECH */
 
-#define OPJ_STATIC
-#define OPJ_HAVE_INTTYPES_H
-#if !defined(_WIN32) && !defined(_WIN64)
-#define OPJ_HAVE_STDINT_H
-#endif
 #define USE_JPIP
 
 #include <openjpeg.h>