adding our optional hook to login upon a failure

diff --git a/tools/hooks/C10shell b/tools/hooks/C10shell
new file mode 100755 (executable)
index 0000000..0a13d10
--- /dev/null
+++ b/tools/hooks/C10shell
@@ -0,0 +1,7 @@
+#!/bin/bash
+# example file to be used with --hookdir
+#
+# invoke shell if build fails.
+apt-get install -y --force-yes vim less 
+cd /tmp/buildd/*/debian/..
+/bin/bash < /dev/tty > /dev/tty 2> /dev/tty