MLBEDSW-7853: Missing options for RANDOM_UNIFORM operator

The operator mapping for the RANDOM_UNIFORM operator was missing the
seed and seed 2 options which resulted in those options being removed
when the operator was passed through Vela.

Change-Id: I8469c239ec1d20d775c31a52e4954baf159643f2
Signed-off-by: Rickard Bolin <rickard.bolin@arm.com>
diff --git a/ethosu/vela/tflite_mapping.py b/ethosu/vela/tflite_mapping.py
index b1e0eae..a94db70 100644
--- a/ethosu/vela/tflite_mapping.py
+++ b/ethosu/vela/tflite_mapping.py
@@ -1000,7 +1000,17 @@
         ),
         TFLITE_NO_INDICES,
     ),
-    BuiltinOperator.RANDOM_UNIFORM: (Op.RandomUniform, None, TFLITE_NO_INDICES),
+    BuiltinOperator.RANDOM_UNIFORM: (
+        Op.RandomUniform,
+        OptionsSerializer(
+            "RandomOptions",
+            (
+                "seed",
+                "seed2",
+            ),
+        ),
+        TFLITE_NO_INDICES,
+    ),
     BuiltinOperator.MULTINOMIAL: (Op.Multinomial, None, TFLITE_NO_INDICES),
     BuiltinOperator.GELU: (Op.Gelu, OptionsSerializer("GeluOptions", ("approximate",)), TFLITE_NO_INDICES),
     BuiltinOperator.DYNAMIC_UPDATE_SLICE: (