LU-6484 build: remove unused LIBLUSTRE stuff

LU-6484 build: remove unused LIBLUSTRE stuff

- Remove unused LIBLUSTRE stuff
- Fix packaging for ptlrpc module
- Remove liblustre.h
- Remove LIBLUSTRE_TEST
- Remove LLCPPFLAGS and LLCFLAGS
- Remove AC_LUSTRE_LIB_VER_OFFSET_WARN

Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Change-Id: Ib1735e75a8e1b043eacca861448cecdfc84283cd
Reviewed-on: http://review.whamcloud.com/14543
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: frank zago <fzago@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>