add make -C test/interactive-helper/ to .travis.yml

.travis.yml

@@ -2,4 +2,4 @@ language: cpp
 before_install:
  - sudo apt-get update -q
  - sudo apt-get install -q --no-install-recommends dpkg-dev debhelper libdb-dev gettext libcurl4-gnutls-dev zlib1g-dev libbz2-dev xsltproc docbook-xsl docbook-xml po4a autotools-dev autoconf automake doxygen debiandoc-sgml stunnel4
-script: make && make test && test/integration/run-tests
+script: make && make -C test/interactive-helper/ && make test && test/integration/run-tests