llama : add simple-chat example (llama/10124)

* llama : add simple-chat example

---------

Co-authored-by: Xuan Son Nguyen <[email protected]>

ggml/include/ggml.h

@@ -558,10 +558,10 @@ extern "C" {
 
     enum ggml_log_level {
         GGML_LOG_LEVEL_NONE  = 0,
-        GGML_LOG_LEVEL_INFO  = 1,
-        GGML_LOG_LEVEL_WARN  = 2,
-        GGML_LOG_LEVEL_ERROR = 3,
-        GGML_LOG_LEVEL_DEBUG = 4,
+        GGML_LOG_LEVEL_DEBUG = 1,
+        GGML_LOG_LEVEL_INFO  = 2,
+        GGML_LOG_LEVEL_WARN  = 3,
+        GGML_LOG_LEVEL_ERROR = 4,
         GGML_LOG_LEVEL_CONT  = 5, // continue previous log
     };