whetstone: add a hash file

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/whetstone/whetstone.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256 333e4ceca042c146f63eec605573d16ae8b07166cbc44a17bec1ea97c6f1efbf  whetstone.c