automake: avoid precedence error when using Perl 5.41+. Reported by Igor Todorovski <itodorov@ca.ibm.com> in <https://lists.gnu.org/archive/html/automake/2025-01/msg00000.html>. * bin/automake.in (transform): Parentheses the '!' operators so Perl 5.41.8 doesn't warn about "possible precedence problem".