Pass in path to test runner script.

Change-Id: I94c405e1aa62a8b5bdb94d0ee0264fb653102b0a

test.sh

diff --git a/test.sh b/test.sh
index 8b0b657..a34cf30 100755
--- a/test.sh
+++ b/test.sh
@@ -10,7 +10,7 @@
 
 set +e
 STTY_CONFIG=`stty -g 2>/dev/null`
-$PYTHON_RUNNER -u "`get_path "$ROOT_PATH/tests/run_tests.py"`" --exclude "skip_${DETECTED_OS}" --properties-file "`get_path "$ROOT_PATH/output/properties.csproj"`" -r "`get_path "$TESTS_RESULTS"`" -t "`get_path "$TESTS_FILE"`" "$@"
+$PYTHON_RUNNER -u "`get_path "$ROOT_PATH/tests/run_tests.py"`" --exclude "skip_${DETECTED_OS}" --properties-file "`get_path "$ROOT_PATH/output/properties.csproj"`" -r "`get_path "$TESTS_RESULTS"`" -t "`get_path "$TESTS_FILE"`" "$@" --variable PATH:${ROOTDIR}
 RESULT_CODE=$?
 set -e
 if [ -n "${STTY_CONFIG:-}" ]