modular/shell/exercises/hearing: Replace 2012-04-uchichicago commit with 2012-02...

Replace the copy-paste bf93a25 (added data, 2012-03-20) from the
Chicago boot camp with the earlier 3e24204 (Added Da for Shell
example, 2012-01-30) from the Trieste boot camp [2].

[1]: https://github.com/thehackerwithin/UofCSCBC2012
[2]: https://github.com/thehackerwithin/PyTrieste

diff --git a/modular b/modular
index 9ff2e80e4df2586aec94461115764da7d37c3967..e09f431be6ea2defb8c6e5a7980848fa600287b0 160000 (submodule)
--- a/modular
+++ b/modular
@@ -1 +1 @@
-Subproject commit 9ff2e80e4df2586aec94461115764da7d37c3967
+Subproject commit e09f431be6ea2defb8c6e5a7980848fa600287b0