Contribs: add openjpeg

This wasn't present in the old contribs

contrib/src/openjpeg/SHA512SUMS

+3b7e07f9c41b007b45e607806073a42ee736d1fea7ab4286ed5046710adac910f656e5b40b420849852100b0fa1fd241597be90e0b2eb58e336fb73b757e1417  openjpeg_v1_4_sources_r697.tgz

contrib/src/openjpeg/pkg-config.patch

+--- openjpeg/Makefile.am	2011-01-02 19:14:55.000000000 +0100
++++ openjpeg.new/Makefile.am	2011-09-15 13:07:38.002469677 +0200
+@@ -9,7 +9,7 @@
+ 
+ distclean-local: clean-local
+ 
+-pkgconf_dir = /usr/lib/pkgconfig
++pkgconf_dir = $(libdir)/pkgconfig
+ 
+ install-data-hook:
+ 	@echo ""

contrib/src/openjpeg/rules.mak

+# jpeg
+
+OPENJPEG_VERSION := 1_4_sources_r697
+OPENJPEG_URL := http://openjpeg.googlecode.com/files/openjpeg_v$(OPENJPEG_VERSION).tgz
+
+$(TARBALLS)/openjpeg_v$(OPENJPEG_VERSION).tgz:
+	$(call download,$(OPENJPEG_URL))
+
+.sum-openjpeg: openjpeg_v$(OPENJPEG_VERSION).tgz
+
+openjpeg: openjpeg_v$(OPENJPEG_VERSION).tgz .sum-openjpeg
+	$(UNPACK)
+	$(APPLY) $(SRC)/openjpeg/pkg-config.patch
+	$(MOVE)
+
+.openjpeg: openjpeg
+	$(RECONF)
+	cd $< && $(HOSTVARS) ./configure --enable-png=no --enable-tiff=no $(HOSTCONF)
+	cd $< && $(MAKE) install
+	touch $@