Make llama.cpp read prompt size and seed from settings (#2299)

modules/llamacpp_model.py

@@ -39,8 +39,8 @@ class LlamaCppModel:
 
         params = {
             'model_path': str(path),
-            'n_ctx': 2048,
-            'seed': 0,
+            'n_ctx': shared.args.n_ctx,
+            'seed': int(shared.args.llama_cpp_seed),
             'n_threads': shared.args.threads or None,
             'n_batch': shared.args.n_batch,
             'use_mmap': not shared.args.no_mmap,