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/assignment3.tests b/shell/ash_test/ash-misc/assignment3.tests
new file mode 100755
index 0000000..790129b
--- /dev/null
+++ b/shell/ash_test/ash-misc/assignment3.tests
@@ -0,0 +1,5 @@
+# This must be interpreted as assignments
+a=1 b\
+=2 c=3
+echo Done:$?
+echo abc=$a$b$c