Use https to clone jack2, build test jack2 in CI

.travis.yml

@@ -58,6 +58,7 @@ install:
 
 script:
   - bash ${TRAVIS_BUILD_DIR}/bootstrap.sh ${TARGET}
+  - bash ${TRAVIS_BUILD_DIR}/build-jack.sh ${TARGET}
   - bash ${TRAVIS_BUILD_DIR}/build-plugins.sh ${TARGET} ${PLUGINS}
 
 before_deploy:

build-jack.sh

@@ -155,7 +155,7 @@ fi
 # ---------------------------------------------------------------------------------------------------------------------
 # and finally jack2
 
-jack2_repo="git@github.com:jackaudio/jack2.git"
+jack2_repo="https://github.com/jackaudio/jack2.git"
 jack2_prefix="${PAWPAW_PREFIX}-jack2"
 
 jack2_args="--prefix=${jack2_prefix}"