hush: fix raw ^C handlisg in single-quoted strings

function                                             old     new   delta
parse_stream                                        2719    2754     +35

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-misc/control_char1.tests b/shell/ash_test/ash-misc/control_char1.tests
index a2ebeba..0cfe601 100755
--- a/shell/ash_test/ash-misc/control_char1.tests
+++ b/shell/ash_test/ash-misc/control_char1.tests
@@ -1,2 +1,3 @@
 echo 
+echo 'b#c'
 echo Done:$?