portmap: add a hash file

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/portmap/portmap.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256 02c820d39f3e6e729d1bea3287a2d8a6c684f1006fb9612f97dcad4a281d41de  portmap-6.0.tgz