LU-620 llite: add delete_from_page_cache and remove_from_page_cache check

LU-620 llite: add delete_from_page_cache and remove_from_page_cache check

Later 2.6.32 kernel use memory cgroup feature but does not export
truncate_complete_page but export delete_from_page_cache or
remove_from_page_cache, we need properly use them for pachless client
code.

Change-Id: I33e3e7c32b548866ee77753ef8a8193c814d0ecb
Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/1399
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>