android enable su in source code

zhaofengyi@moosgod-MS-7B10:~/mtkz300/system/core$ git diff
diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index cc96ff8..8f44691 100644
--- a/libcutils/fs_config.cpp
+++ b/libcutils/fs_config.cpp
@@ -166,7 +166,7 @@ static const struct fs_path_config android_files[] = {
     // the following two files are INTENTIONALLY set-uid, but they
     // are NOT included on user builds.
     { 06755, AID_ROOT,      AID_ROOT,      0, "system/xbin/procmem" },
-    { 04750, AID_ROOT,      AID_SHELL,     0, "system/xbin/su" },
+    { 06755, AID_ROOT,      AID_SHELL,    0, "system/xbin/su" },
 
     // the following files have enhanced capabilities and ARE included
     // in user builds.