component/theia: Fix keytar rpath with patchelf

On Debian 9, the given rpath seem to be ignored when compiling
the `keytar` dependency of theia, for unknown reasons.

component/theia/buildout.cfg

@@ -3,6 +3,7 @@ extends =
   ../java-jdk/buildout.cfg
   ../libsecret/buildout.cfg
   ../pkgconfig/buildout.cfg
+  ../patchelf/buildout.cfg
   ../yarn/buildout.cfg
   download-plugins.cfg
   buildout.hash.cfg
@@ -37,6 +38,12 @@ pre-configure =
 configure-command = true
 make-binary = cd %(location)s && ${yarn:location}/bin/yarn
 make-targets = theia build
+post-install =
+  # On Debian 9 the -rpath are not taken into account by yarn build for unknown reasons
+  cd %(location)s/node_modules/keytar/build/Release
+  ${patchelf:location}/bin/patchelf --set-rpath \
+    ${libsecret:location}/lib:${gettext:location}/lib:${glib:location}/lib \
+    keytar.node obj.target/keytar.node
 
 [theia-wrapper]
 recipe = slapos.recipe.template:jinja2