Updates trashman: 7239f3c Adds trashman/gr-gsm

diff --git a/trashman b/trashman
index 559d3611ff643c1c8ebdcd0b7515767252a4832a..7239f3c5b30b42ae874e86c3bd8ad4a11c665b9a 160000 (submodule)
--- a/trashman
+++ b/trashman
@@ -1 +1 @@
-Subproject commit 559d3611ff643c1c8ebdcd0b7515767252a4832a
+Subproject commit 7239f3c5b30b42ae874e86c3bd8ad4a11c665b9a