make test: archive failed test data with build logs.

- Fix invocation of compress_failed.sh
- Fix compress_failed to copy compressed results
  files to $WORKSPACE/archives and return failure
  exit code.

Failed test case data will be copied to logs.fd.io
and found in the archives/<make test data dir>-FAILED
directory in the build log link in the
vpp-verify-master-ubuntu1604 jenkins job page.

For example:
https://logs.fd.io/production/vex-yul-rot-jenkins-1/vpp-verify-master-ubuntu1604/7353/archives/

Change-Id: Ife9a0737115e69c0a8441e3bb0133af1528d909b
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
diff --git a/test/Makefile b/test/Makefile
index 721ec96..da77acc 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -86,8 +86,7 @@
 	@touch $@
 
 define retest-func
-	@env VPP_TEST_FAILED_DIR=$(VPP_TEST_FAILED_DIR) scripts/setsid_wrapper.sh $(FORCE_FOREGROUND) $(PYTHON_VENV_PATH)/bin/activate python run_tests.py -d $(TEST_DIR) $(UNITTEST_EXTRA_OPTS)
-	@env VPP_TEST_FAILED_DIR=$(VPP_TEST_FAILED_DIR) scripts/compress_failed.sh
+	@env VPP_TEST_FAILED_DIR=$(VPP_TEST_FAILED_DIR) scripts/setsid_wrapper.sh $(FORCE_FOREGROUND) $(PYTHON_VENV_PATH)/bin/activate python run_tests.py -d $(TEST_DIR) $(UNITTEST_EXTRA_OPTS) || env VPP_TEST_FAILED_DIR=$(VPP_TEST_FAILED_DIR) COMPRESS_FAILED_TEST_LOGS=$(COMPRESS_FAILED_TEST_LOGS) scripts/compress_failed.sh
 endef
 
 .PHONY: sanity