tests: use $RUNTESTDIR instead of $TESTDIR in narrow-library.sh
This is done so that third party extensions can use narrow-library.sh in tests.
Differential Revision: https://phab.mercurial-scm.org/D5400
--- a/tests/narrow-library.sh Mon Dec 10 10:21:08 2018 +0100
+++ b/tests/narrow-library.sh Mon Dec 10 15:45:46 2018 +0300
@@ -2,7 +2,7 @@
[extensions]
narrow=
[ui]
-ssh=python "$TESTDIR/dummyssh"
+ssh=python "$RUNTESTDIR/dummyssh"
[experimental]
changegroup3 = True
EOF