httpserver.so does not build propery for many:

  LINK httpserver
  /usr/bin/ld: cannot find -lboost_system-mt
  /usr/bin/ld: cannot find -lboost_filesystem-mt
  /usr/bin/ld: cannot find -lboost_program_options-mt
  collect2: error: ld returned 1 exit status

drop it from osv.git build until it does.

Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>