init.rc: mount debugfs for debugging

- put it at /sys/kernel/debug so Arve will be happy
- symlink /d to /sys/kernel/debug so Brian will be happy.

rootdir/init.rc

@@ -17,6 +17,7 @@ loglevel 3
 
 # Backward compatibility
     symlink /system/etc /etc
+    symlink /sys/kernel/debug /d
 
 # create mountpoints and mount tmpfs on sqlite_stmt_journals
     mkdir /sdcard 0000 system system
@@ -163,6 +164,8 @@ on boot
     setprop ro.CONTENT_PROVIDER_MEM 5632
     setprop ro.EMPTY_APP_MEM 6144
 
+    mount debugfs /sys/kernel/debug /sys/kernel/debug
+
 # Write value must be consistent with the above properties.
 # Note that the driver only supports 6 slots, so we have HOME_APP at the
 # same memory level as services.