Remove m4 addition to ACLOCAL_AMFLAGS and add more files to .gitignore
Remove m4 addition to ACLOCAL_AMFLAGS and add more files to .gitignore

* Older versions of autoreconf don't run libtoolize correctly, and even
  newer versions can run aclocal before libtoolize, which fails due to
  a non-existing 'm4' directory. Revert previous addition of 'm4' to
  ACLOCAL_AMFLAGS and just live with the warning (until any local .m4
  files need to be added to the project).
* Add test-suite related files to .gitignore

google/google-authenticator-libpam,google/google-authenticator-libpam,google/google-authenticator-libpam,google/google-authenticator-libpam