[systemtap/f16] (12 commits) ...Merge branch 'f18' into f17

[Josh Stone]

Summary of changes:

  5033587... Fix ifarch statement (*)
  758d9e3... fix up the %if statement for x86_64 (*)
  17dcdfd... use file based requires (*)
  4fb0fa4... bz840902 ppc build fix (related to bz837641) (*)
  4041ad6... Update to a snapshot of the upcoming 2.0 release. (*)
  11e4d93... add libdwarf-devel to buildreqs for dyninst build (*)
  58e329e... dyninst not available on s390(x) and arm (*)
  582bf21... Correct the location of stap-env (*)
  1e649c3... Correct the location of stap-env (*)
  37ef790... Update to a new snapshot towards 2.0. (*)
  4e1f190... upstream release 2.0 (*)
  0ab61fd... Merge branch 'f18' into f17 (*)

(*) This commit already existed in another branch; no separate mail sent