set binmode to avoid 'Wide character in print' warning

I received 'Wide character in print at ...' warnings, and set binmode to avoid them.

For your reference, my environment is as below:

    $ perlbug -d
    ---
    Flags:
        category=core
        severity=low
    ---
    Site configuration information for perl 5.17.6:
    
    Configured by ${USER} at Wed Dec 19 16:22:33 JST 2012.
    
    Summary of my perl5 (revision 5 version 17 subversion 6) configuration:
       
      Platform:
        osname=linux, osvers=2.6.18-308.el5, archname=x86_64-linux
        uname='linux ${HOSTNAME} 2.6.18-308.el5 #1 smp tue feb 21 20:06:06 est 2012 x86_64 x86_64 x86_64 gnulinux '
        config_args='-de -Dprefix=${HOME}/perl5/perlbrew/perls/perl-5.17.6 -Dusedevel -Aeval:scriptdir=${HOME}/perl5/perlbrew/perls/perl-5.17.6/bin'
        hint=recommended, useposix=true, d_sigaction=define
        useithreads=undef, usemultiplicity=undef
        useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
        use64bitint=define, use64bitall=define, uselongdouble=undef
        usemymalloc=n, bincompat5005=undef
      Compiler:
        cc='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
        optimize='-O2',
        cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
        ccversion='', gccversion='4.1.2 20080704 (Red Hat 4.1.2-52)', gccosandvers=''
        intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
        d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
        ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
        alignbytes=8, prototype=define
      Linker and Libraries:
        ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
        libpth=/usr/local/lib /lib /usr/lib /lib64 /usr/lib64 /usr/local/lib64
        libs=-lnsl -ldl -lm -lcrypt -lutil -lc
        perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
        libc=/lib/libc-2.5.so, so=so, useshrplib=false, libperl=libperl.a
        gnulibc_version='2.5'
      Dynamic Linking:
        dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
        cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector'
    
    Locally applied patches:
        
    
    ---
    @INC for perl 5.17.6:
        ${HOME}/perl5/perlbrew/perls/perl-5.17.6/lib/site_perl/5.17.6/x86_64-linux
        ${HOME}/perl5/perlbrew/perls/perl-5.17.6/lib/site_perl/5.17.6
        ${HOME}/perl5/perlbrew/perls/perl-5.17.6/lib/5.17.6/x86_64-linux
        ${HOME}/perl5/perlbrew/perls/perl-5.17.6/lib/5.17.6
        .
    
    ---
    Environment for perl 5.17.6:
        HOME=${HOME}
        LANG=ja_JP.UTF-8
        LANGUAGE (unset)
        LD_LIBRARY_PATH (unset)
        LOGDIR (unset)
        PATH=${HOME}/local/bin:${HOME}/perl5/perlbrew/bin:${HOME}/perl5/perlbrew/perls/perl-5.17.6/bin:/usr/local/bin:/bin:/usr/bin
        PERLBREW_BASHRC_VERSION=0.58
        PERLBREW_HOME=${HOME}/.perlbrew
        PERLBREW_MANPATH=${HOME}/perl5/perlbrew/perls/perl-5.17.6/man
        PERLBREW_PATH=${HOME}/perl5/perlbrew/bin:${HOME}/perl5/perlbrew/perls/perl-5.17.6/bin
        PERLBREW_PERL=perl-5.17.6
        PERLBREW_ROOT=${HOME}/perl5/perlbrew
        PERLBREW_VERSION=0.58
        PERL_BADLANG (unset)
        SHELL=/bin/bash