LU-13783 libcfs: support absence of account_page_dirtied

LU-13783 libcfs: support absence of account_page_dirtied

Some kernels export neither account_page_dirtied nor
kallsyms_lookup_name.
For these kernels we need to use __set_page_dirty() and suffer the
cost of dropping an reclaiming the page-tree lock.

Lustre-change: https://review.whamcloud.com/40827
Lustre-commit: 6be4b3118c16039cff52e9a781b7d1852489a969

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I69d934480832f3909d3ec103f11e1d62489d70d7
Reviewed-on: https://review.whamcloud.com/43650
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Li Xi <lixi@ddn.com>