LU-533 Include posix-types.h in headers and distribution

LU-533 Include posix-types.h in headers and distribution

Include libcfs/posix/posix-types.h in the main rpm, and
add #include statements in lustre_user.h and ll_fiemap.h.
This will allow user-space applications that include these
files to compile.

Change-Id: Ibe391bf28afe91b3914ca1eb07fe66e408b21b4a
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/1138
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>