Build MuPDF without ICC/lcms2 (#580)

This recently added color management code may cause corrupted
images, and may be responsible for some erratic behaviour noticed
on Kobo.

Makefile.third

@@ -64,7 +64,7 @@ $(MUPDF_LIB) $(MUPDF_DIR)/include: $(JPEG_LIB) \
 		$(CMAKE) -DHOSTCFLAGS="$(HOSTCFLAGS)" -DHOSTCC="$(HOSTCC)" \
 		-DCC="$(CC)" -DCFLAGS="$(CFLAGS)" -DOS="$(if $(WIN32),,Other)" \
 		-DAR="$(AR)" -DLDFLAGS="$(LDFLAGS) -L$(CURDIR)/$(OUTPUT_DIR)" \
-		-DXCFLAGS="$(CFLAGS) -DNOBUILTINFONT -I$(JPEG_DIR)/include -I$(FREETYPE_DIR)/include/freetype2 -I$(ZLIB_DIR) -I$(MINIZIP_DIR)" \
+		-DXCFLAGS="$(CFLAGS) -DNOBUILTINFONT -DNO_ICC -I$(JPEG_DIR)/include -I$(FREETYPE_DIR)/include/freetype2 -I$(ZLIB_DIR) -I$(MINIZIP_DIR)" \
 		-DMUPDF_LIB_STATIC=$(MUPDF_LIB_STATIC) \
 		-DMUPDF_THIRDPARTY_LIBS=$(MUPDF_THIRDPARTY_LIBS) \
 		-DMUPDF_LIB=$(CURDIR)/$(MUPDF_LIB) \