ash,hush: handle a few more bkslash-newline cases

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-parsing/bkslash_newline1.tests b/shell/ash_test/ash-parsing/bkslash_newline1.tests
new file mode 100755
index 0000000..6e374c4
--- /dev/null
+++ b/shell/ash_test/ash-parsing/bkslash_newline1.tests
@@ -0,0 +1,8 @@
+echo and1 &\
+& echo and2
+
+echo or1 |\
+| echo NOT SHOWN
+
+case w in a) echo SKIP;\
+; w) echo ok;; esac;