Add a top-level makefile target for running the foreign document test.

Makefile

@@ -42,6 +42,10 @@ dockertest:
 > $(MAKE) -C docker/organic_test
 > docker run --init --rm -i -t --read-only -v "$$(readlink -f ./):/source:ro" --mount type=tmpfs,destination=/tmp --mount source=cargo-cache,target=/usr/local/cargo/registry --mount source=rust-cache,target=/target --env CARGO_TARGET_DIR=/target -w /source organic-test --no-default-features --features compare --no-fail-fast --lib --test test_loader -- --test-threads $(TESTJOBS)
 
+.PHONY: foreign_document_test
+foreign_document_test:
+> $(MAKE) -C docker/organic_test run_foreign_document_test
+
 .PHONY: dockerclean
 dockerclean:
 # Delete volumes created for running the tests in docker. This does not touch anything related to the jaeger docker container.