Superuser: update to the 3.2-RC2 version of Superuser

From http://androidsu.com/superuser/

This brings the version in line with the current version of
the su binary and fixes the bug where su approval is
not stored.

Change-Id: I0ca67ae79942f34eaa16cc3cf26b312cf7a8cd67
diff --git a/prebuilt/common/apps/Superuser.apk b/prebuilt/common/apps/Superuser.apk
index abd5be3..a550070 100644
--- a/prebuilt/common/apps/Superuser.apk
+++ b/prebuilt/common/apps/Superuser.apk
Binary files differ