add support of config file

add the new implementation of the config file support to allow control
flags to be passed in from config file to turn on/off individual coding
tool for tool-on and tool-off tests.

Change-Id: I079bc768dbce5be7cc9d28dae6f346bc1ff26e0e
diff --git a/apps/aomenc.h b/apps/aomenc.h
index 5e59c1a..ba7bf0a 100644
--- a/apps/aomenc.h
+++ b/apps/aomenc.h
@@ -11,6 +11,7 @@
 #ifndef AOM_APPS_AOMENC_H_
 #define AOM_APPS_AOMENC_H_
 
+#include "aom/aom_codec.h"
 #include "aom/aom_encoder.h"
 
 #ifdef __cplusplus
@@ -54,6 +55,7 @@
   int disable_warning_prompt;
   int experimental_bitstream;
   aom_chroma_sample_position_t csp;
+  cfg_options_t encoder_config;
 };
 
 #ifdef __cplusplus