Add missing program to .gitignore

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/programs/.gitignore b/programs/.gitignore
index 3775216..8420c81 100644
--- a/programs/.gitignore
+++ b/programs/.gitignore
@@ -34,6 +34,7 @@
 psa/crypto_examples
 psa/key_ladder_demo
 psa/psa_constant_names
+psa/psa_hash
 random/gen_entropy
 random/gen_random_ctr_drbg
 random/gen_random_havege