Update Docker testing for the separate native-image installable

Author: chrisseaton

doc/contributor/docker.md

@@ -30,9 +30,9 @@ $ jt docker print --fedora28 --source --rvm
 Or, to run a full set of tests on a set of new release candidate tarballs:
 
 ```bash
-$ jt docker test --graalvm graalvm-ce.tar.gz ruby-installable.jar --test release_branch
-$ jt docker test --graalvm graalvm-ee.tar.gz ruby-installable.jar --test release_branch
-$ jt docker test --graalvm graalvm-ee.tar.gz ruby-installable.jar --rebuild-images --test release_branch
+$ jt docker test --graalvm graalvm-ce.tar.gz ruby-installable-ce.jar --test release_branch
+$ jt docker test --graalvm graalvm-ee.tar.gz ruby-installable-ee.jar --test release_branch
+$ jt docker test --graalvm graalvm-ee.tar.gz ruby-installable-ee.jar --rebuild-images native-image-installable-ee.jar --test release_branch
 $ jt docker test --standalone truffleruby-linux-amd64.tar.gz --test release_branch
 ```
 

tool/jt.rb

@@ -2078,6 +2078,7 @@ def dockerfile(*args)
         source_branch = args.shift
       when '--rebuild-images'
         rebuild_images = true
+        native_component = args.shift
       when '--no-rebuild-openssl'
         rebuild_openssl = false
       when '--no-manager'
@@ -2199,6 +2200,7 @@ def dockerfile(*args)
 
     if rebuild_images
       if [:public, :graalvm].include?(install_method)
+        lines.push "RUN #{graalvm_bin}/gu install --file /test/#{native_component} | tee install.log"
         lines.push "RUN #{graalvm_base}/bin/gu rebuild-images ruby"
       else
         abort "can't rebuild images for a build not from public or from local GraalVM components"