Install build-essential at compile time

[wolf31o2]

Otherwise, the Gem will fail to build due to missing dependencies.

[wolf31o2]

Solves this problem:

       Recipe: krb5::rkerberos_gem

           - install version 1.10.3-37.el6_6 of package krb5-devel
         * chef_gem[rkerberos] action install

           ================================================================================
           Error executing action `install` on resource 'chef_gem[rkerberos]'
           ================================================================================

           Mixlib::ShellOut::ShellCommandFailed
           ------------------------------------
           Expected process to exit with [0], but received '1'
           ---- Begin output of /opt/chef/embedded/bin/gem install rkerberos -q --no-rdoc --no-ri -v "0.1.3" ----
           STDOUT: Successfully installed rake-compiler-0.9.5
           Building native extensions.  This could take a while...
           STDERR: ERROR:  Error installing rkerberos:
            ERROR: Failed to build gem native extension.

        /opt/chef/embedded/bin/ruby -r ./siteconf20150608-2634-1iaav4n.rb extconf.rb
           checking for krb5.h... *** extconf.rb failed ***
           Could not create Makefile due to some reason, probably lack of necessary
           libraries and/or headers.  Check the mkmf.log file for more details.  You may
           need configuration options.

           Provided configuration options:
            --with-opt-dir
            --with-opt-include
            --without-opt-include=${opt-dir}/include
            --with-opt-lib
            --without-opt-lib=${opt-dir}/lib
            --with-make-prog
            --without-make-prog
            --srcdir=.
            --curdir
            --ruby=/opt/chef/embedded/bin/ruby
            --with-rkerberos-dir
            --without-rkerberos-dir
            --with-rkerberos-include
            --without-rkerberos-include=${rkerberos-dir}/include
            --with-rkerberos-lib
            --without-rkerberos-lib=${rkerberos-dir}/lib
           /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:467:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
           You have to install development tools first.
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:598:in `try_cpp'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:1078:in `block in have_header'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:929:in `block in checking_for'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in postpone'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:321:in `open'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:321:in `open'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:347:in `postpone'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:928:in `checking_for'
            from /opt/chef/embedded/lib/ruby/2.1.0/mkmf.rb:1077:in `have_header'
            from extconf.rb:5:in `<main>'

           extconf failed, exit code 1

           Gem files will remain installed in /opt/chef/embedded/lib/ruby/gems/2.1.0/gems/rkerberos-0.1.3 for inspection.
           Results logged to /opt/chef/embedded/lib/ruby/gems/2.1.0/extensions/x86_64-linux/2.1.0/rkerberos-0.1.3/gem_make.out

[duddun]

LGTM