hush: add tickquote1.tests from ash testsuite

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-misc/tickquote1.tests b/shell/ash_test/ash-misc/tickquote1.tests
index 90d5bbc..8416ad9 100755
--- a/shell/ash_test/ash-misc/tickquote1.tests
+++ b/shell/ash_test/ash-misc/tickquote1.tests
@@ -1 +1 @@
-echo `"pwd`
+echo _`"pwd`_