[libint2/f18] (3 commits) ...Update to 615hg, fixing FTBFS.

[Susi Lehtola]

Summary of changes:

  3b2b3f2... Initial import. (*)
  d1623d3... Doesn't build on i386, make package ExclusiveArch. (*)
  a108042... Update to 615hg, fixing FTBFS. (*)

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