package/libpam-tacplus: add .hash file

Similar to jquery-keyboard, it seems the libpam-tacplus tarball on the
autobuilder is corrupt.  Fix it by adding a .hash file so it falls back to
our s.b.o mirror.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libpam-tacplus/libpam-tacplus.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256 747f7ad980a3726ed3abc5fec92e867efa8af8c53caac547cab7eb6af5ce0edf  libpam-tacplus-1.3.9.tar.gz