FROMLIST: selinux: Fix typo in filesystem name

Correct the filesystem name to "binder" to enable
genfscon per-file labelling for binderfs.

Fixes: 7a4b5194747 ("selinux: allow per-file labelling for binderfs")
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>

Bug: 136497735
Change-Id: I6139ede4eb6e85f5399f826834b062bbf33d28cf
Link: https://lore.kernel.org/patchwork/patch/1188587/