LU-000 llite: add fscache support

pass compile for !CONFIG_LUSTRE_FSCACHE

Signed-off-by: Peng Tao <bergwolf@gmail.com>
Change-Id: I25cda0aeb97f5eb3cb8ece1cc2cf133e73396953
LU-000 llite: add fscache support

pass gcc with CONFIG_LUSTRE_FSCACHE

Signed-off-by: Peng Tao <bergwolf@gmail.com>
Change-Id: I3f5d44094f67cccacd28649d6c24aff1820d1df0
LU-000 llite: add fscache support

finish ll_fscache_inode_object_def.

Now llite/fscache seems to be working. Next step is to change
autoconf/Makefile.in.

Signed-off-by: Peng Tao <bergwolf@gmail.com>
Change-Id: I4d45acd72d520961fb71ed85ba0b99c66184dff3