Explicitly BR perl-FindBin.
    
    I'm not sure how this managed to build before now, but the Perl script
    called "fixrom.pm" definitely does "use FindBin" so this dependency is
    required.  The error was:
    
    BEGIN failed--compilation aborted at ./util/fixrom.pl line 23.
    Can't locate FindBin.pm in @INC (you may need to install the FindBin module) (@INC contains: /usr/local/lib64/perl5/5.32 /usr/local/share/perl5/5.32 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at ./util/fixrom.pl line 23.