travis: use variable to avoid one call

diff --git a/travis-ci/managers/xenial.sh b/travis-ci/managers/xenial.sh
index 7c7e163e4e75756acf25a1f36521b28cadbb4bc5..865d63170f3d703f8a483ec2598e3bd3447d1782 100755 (executable)
--- a/travis-ci/managers/xenial.sh
+++ b/travis-ci/managers/xenial.sh
@@ -43,7 +43,7 @@ apt-get build-dep systemd -y
 apt-get install -y "${PACKAGES[@]}"
 pip3 install meson
 
-cd ${REPO_ROOT:-$(pwd)}
+cd ${REPO_ROOT:-$PWD}
 
 sed -i 's/2\.30/2.27/' meson.build