Fix a broken case of autosink.

$foo.bar() will not be a top-level callmethod, but will actually wrap
it in something to do Perl 6 type coercion if the method returns some
other object. This we need p6type in the autosink list too.

src/Perl6/Actions.pm

@@ -86,6 +86,7 @@ class Perl6::Actions is HLL::Actions does STDActions {
             'if',           1,
             'unless',       1,
             'handle',       1,
+            'p6type',       1,
     );
     sub autosink($past) {
         nqp::istype($past, QAST::Op) && %sinkable{$past.op} && !$past<nosink>