add help info for debug_dir & op_compiler_cache_dir/mode

ge/offline/main.cc

@@ -299,7 +299,11 @@ class GFlagUtils {
         "  --save_original_model   Control whether to output original model. E.g.: true: output original model\n"
         "  --log                   Generate log with level. Support debug, info, warning, error, null\n"
         "  --dump_mode             The switch of dump json with shape, to be used with mode 1. "
-        "0(default): disable; 1: enable.");
+        "0(default): disable; 1: enable.\n"
+        "  --debug_dir                Set the save path of operator compilation intermediate files. Default value: ./\n"
+        "  --op_compiler_cache_dir    Set the save path of operator compilation cache files. Default value: ./\n"
+        "  --op_compiler_cache_mode   Set the operator compilation cache mode."
+        "Options are disable(default), enable and force(force to refresh the cache)");
 
     gflags::ParseCommandLineNonHelpFlags(&argc, &argv, true);
     // Using gflags to analyze input parameters