ash testsuite: add most of hust tests which pass for ash

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-misc/sigint1.right b/shell/ash_test/ash-misc/sigint1.right
new file mode 100644
index 0000000..a9094b0
--- /dev/null
+++ b/shell/ash_test/ash-misc/sigint1.right
@@ -0,0 +1 @@
+Sending SIGINT to main shell PID