run_remote_tests: add quote marks around argument passing

* stops the second-pass parsing of arguments into IFS-delimited elements
which unbreaks things like --args='-n 10'

Change-Id: If8424b5fc06e6dd5a935421a76539e7e91006c37

BUG=
TEST=run it and see the argument being passed correctly

Review URL: http://codereview.chromium.org/3422005

run_remote_tests.sh

@@ -275,4 +275,4 @@ function main() {
   ./generate_test_report "${TMP}" --strip="${TMP}/"
 }
 
-main $@
+main "$@"