Added functionality to build RPMS of jruby
Added functionality to build RPMS of jruby

Left deb as default but now you can 'make rpm' if that's your kink.
Wurks gud, (though your jdk dependency may vary):

[eric@leterel ~/fpm/jruby]$ rpm -q --requires -p jruby-1.6.1.noarch.rpm
jdk >= 1.6.0
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
[eric@leterel ~/fpm/jruby]$ sudo rpm -Uvh ./jruby-1.6.1.noarch.rpm
Preparing...                ########################################### [100%]
   1:jruby                  ########################################### [100%]
[eric@leterel ~/fpm/jruby]$ /opt/jruby/bin/jruby -e 'puts "hello world"'
hello world

djhaskin987/fpm,djhaskin987/fpm,djhaskin987/fpm,djhaskin987/fpm