Trying to fix #8063 (failure to build gcc2 when updating info files):
* remove all *.info targets so the gcc2 build system doesn't
  try to update them, as that doesn't always work because of
  apparent incompatibilities with newer makeinfo versions

git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@42999 a95241bf-73f2-0310-859d-f6bbb57e9c96
(cherry picked from commit 32fb7269097863eea0514f2dcef0b1778796908b)
Drop another .info target that triggers invocation of makeinfo.(cherry picked from commit af2683a443c644e05362db2948f2fcb30a50df5b)