Updates trashman: f4a87af Fix trashman_installed_at invocations

diff --git a/trashman b/trashman
index 79e203883cfdc898e8651936dbdea68314310010..f4a87af0cbe9c6860864966da97b8fbf7657df89 160000 (submodule)
--- a/trashman
+++ b/trashman
@@ -1 +1 @@
-Subproject commit 79e203883cfdc898e8651936dbdea68314310010
+Subproject commit f4a87af0cbe9c6860864966da97b8fbf7657df89