make: fix build break

N/A

make/tools/mkbootfs/mkbootfs.c:21:46: fatal error: private/gotoos_filesystem_config.h: No such file or directory

Change-Id: I4f2d8dd2bc331cb15bb67fd6cb6bf0bb5f19d79c
Signed-off-by: liminghao <liminghao@xiaomi.com>