ash: support for && and || in [[ expr ]]; add testsuite checks

diff --git a/shell/ash_test/ash-arith/arith-bash1.right b/shell/ash_test/ash-arith/arith-bash1.right
new file mode 100644
index 0000000..b261da1
--- /dev/null
+++ b/shell/ash_test/ash-arith/arith-bash1.right
@@ -0,0 +1,2 @@
+1
+0