LU-930 doc: add man pages to make file

LU-930 doc: add man pages to make file

There are several existing man pages that are not installed on the
Lustre client or server because they are not included in the make
file.  Add the following pages to the Makefile.am file:

lctl-pool_add
lctl-pool_new
l_getsepol
lfs-getname
lfs-getsom
lfs-mirror-copy
lfs-mirror-read
lfs-mirror-write
lfs-rmfid
llapi_get_lum_dir
llapi_get_lum_dir_fd
llapi_get_lum_file
llapi_get_lum_file_fd
llapi_layout_extension_size_get
llapi_layout_extension_size_set
llapi_rmfid
llapi_search_mdt
llapi_search_ost
llapi_search_tgt

Fixes: ca34df3815f7 (LU-930 doc: man pages for lctl pool_new, pool_add)
Fixes: 2a4821b836c8 (LU-12159 utils: improve lfs getname functionality)
Fixes: 697e8fe6f325 (LU-11473 doc: add lfs-getsom man page)
Fixes: c6e7c0788d7c (LU-10258 lfs: lfs mirror copy command)
Fixes: 1fd63fcb045c (LU-12090 utils: lfs rmfid)
Fixes: e82adfcbd00f (LU-930 doc: man page for l_getsepol)
Fixes: 11aa7f8704c4 (LU-11367 som: integrate LSOM with lfs find)
Fixes: fed241911f61 (LU-10070 lod: SEL: Add flag & setstripe support)
Fixes: 096db80e0810 (LU-11264 llapi: clean up llapi_search_tgt() code)

Test-Parameters: trivial

Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: I72c34693a9cf03d2e241d60903020a72339c75b1
Reviewed-on: https://review.whamcloud.com/36598
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Joseph Gmitter <jgmitter@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>