[PATCH] apparmor: Change to use DEFINE_SHOW_ATTRIBUTE macro

[kbuild test robot]

Hi Yangtao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on security/next-testing]
[also build test ERROR on v4.20-rc1 next-20181106]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Yangtao-Li/apparmor-Change-to-use-DEFINE_SHOW_ATTRIBUTE-macro/20181107-004056
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git next-testing
config: i386-randconfig-s0-201844 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> security/apparmor/apparmorfs.o:(.data+0x1c4): undefined reference to `aa_sfs_seq_file_ops'
   security/apparmor/apparmorfs.o:(.data+0x2b4): undefined reference to `aa_sfs_seq_file_ops'
   security/apparmor/apparmorfs.o:(.data+0x2cc): undefined reference to `aa_sfs_seq_file_ops'
   security/apparmor/apparmorfs.o:(.data+0x2e4): undefined reference to `aa_sfs_seq_file_ops'
   security/apparmor/apparmorfs.o:(.data+0x314): undefined reference to `aa_sfs_seq_file_ops'
   security/apparmor/apparmorfs.o:(.data+0x32c): more undefined references to `aa_sfs_seq_file_ops' follow

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