ash: add all hush parsing tests to ast tests

All pass.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-parsing/quote3.right b/shell/ash_test/ash-parsing/quote3.right
new file mode 100644
index 0000000..bbe46df
--- /dev/null
+++ b/shell/ash_test/ash-parsing/quote3.right
@@ -0,0 +1,12 @@
+Testing: in ""
+..
+Testing: in ''
+..
+Testing: in $empty
+Testing: in $empty""
+..
+Testing: in $empty''
+..
+Testing: in "$empty"
+..
+Finished