component/openjpeg: add configuration.

OpenJPEG provides a JPEG 2000 codec for use in GDAL.
This was previously provided by Jasper, but support for Jasper is
removed in recent GDAL versions.

See merge request !1586.

component/openjpeg/buildout.cfg

+[buildout]
+extends =
+  ../cmake/buildout.cfg
+
+parts =
+  openjpeg
+
+[openjpeg]
+recipe = slapos.recipe.cmmi
+shared = true
+version = 2.5.2
+url = https://github.com/uclouvain/openjpeg/archive/refs/tags/v${:version}.tar.gz
+md5sum = f9ee64845881a15109ed0aa73a12202f
+location = @@LOCATION@@
+configure-command = ${cmake:location}/bin/cmake
+configure-options =
+  -DCMAKE_BUILD_TYPE=Release
+  -DCMAKE_INSTALL_PREFIX=@@LOCATION@@
+  -DCMAKE_INSTALL_LIBDIR=lib
+  -DCMAKE_INSTALL_RPATH=${:location}/lib