macloader: Stop allowing G and O write perms to the cidfile

* Only macloader should ever write to this, but others (e.g,
  libbt-vendor.so) read from it. 0644 is more than enough.

Change-Id: I3d2fb3dfec1ba81c9c382ed18c93114e641df4a0

macloader/macloader.c

@@ -230,7 +230,7 @@ int main() {
     ALOGD("Change permissions of %s\n", CID_PATH);
 
     fd = fileno(cidfile);
-    amode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+    amode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
     ret = fchmod(fd, amode);
     if (ret != 0) {
         ALOGE("Can't set permissions on %s - %s\n",