Add missing cache entries

tests/wp-cache/cache/0c8fb0f06d61ec099aac05ae2c74b694.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0035,
+  "steps": 22 }

tests/wp-cache/cache/36c2f07e1e21777d95ff0514a7e57e49.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "timeout", "time": 1. }

tests/wp-cache/cache/74897fcc7f8dbaa13236da778a144d6f.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.007,
+  "steps": 22 }

tests/wp-cache/cache/a752daddc9413c6ff7a6c283d3141694.json

+{ "prover": "Alt-Ergo:2.2.0", "verdict": "valid", "time": 0.0053,
+  "steps": 22 }