Jenkins: Specify debug build, so tests get built

Author: snej

jenkins/jenkins_unix.sh

@@ -28,7 +28,7 @@ git clone ssh://[email protected]/couchbase/couchbase-lite-core-EE --branch $BRANCH
 ulimit -c unlimited # Enable crash dumps
 mkdir -p "couchbase-lite-core/build_cmake/x64"
 pushd "couchbase-lite-core/build_cmake/x64"
-cmake -DBUILD_ENTERPRISE=ON ../..
+cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_ENTERPRISE=ON ../..
 make -j8
 
 # Note only for macOS