new port: rubygem-sigdump

required by recent fluentd
update to 1.1.1

required by recennt rubygem-fluentd
update to 0.10.48
Merge pull request #250 from reallyenglish/10.0@tomoyukis

update rubygem-fluentd to 0.10.48
new port sysutils/rubygem-fluent-plugin-record-modifier