package/erlang-p1-utils: add .hash file

Similar to jquery-keyboard, it seems the erlang-p1-utils 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: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/erlang-p1-utils/erlang-p1-utils.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256 9c7e9fa2990edd419953a6ae609ffed0b90e671b57c468d97c0d85d866d80210 erlang-p1-utils-1.0.3.tar.gz