MFC r196118:

MFC r196118:
  Put minimum alignment on the dpcpu and vnet section so that ld
  when adding the __start_ symbol knows the expected section alignment
  and can place the __start_ symbol correctly.

  These sections will not support symbols with super-cache line alignment
  requirements.

  For full details, see posting to freebsd-current, 2009-08-10,
  Message-ID: <20090810133111.C93661@maildrop.int.zabbadoz.net>.

  Debugging and testing patches by:
                Kamigishi Rei (spambox haruhiism.net),
                np, lstewart, jhb, kib, rwatson
  Tested by:    Kamigishi Rei, lstewart
  Reviewed by:  kib

Approved by:	re

git-svn-id: svn://svn.freebsd.org/base/stable/8@196119 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f