jenkins.sh: output all test logs when 'make check' failed

Assume that cat-testlogs.sh from osmo-ci is installed in $HOME/osmo-ci/scripts,
and call from jenkins.sh upon 'make check' failure.

Change-Id: I6ee37ae638aa0b95222e5c0ec78474fab1f8cfae
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index 8021bbd..b19f0c6 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export PATH="$PATH:$HOME/osmo-ci/scripts"
 
 set -ex
 
@@ -74,5 +75,7 @@
 fi
 
 $MAKE $PARALLEL_MAKE
-LD_LIBRARY_PATH="$inst/lib" $MAKE check
-LD_LIBRARY_PATH="$inst/lib" $MAKE distcheck
+LD_LIBRARY_PATH="$inst/lib" $MAKE check \
+  || cat-testlogs.sh
+LD_LIBRARY_PATH="$inst/lib" $MAKE distcheck \
+  || cat-testlogs.sh