merges r21509 and r21512 from trunk into ruby_1_9_1.
enc/trans/gb18030.trans, gb18030-tbl.rb: new Chinese GB18030 transcoding (from Yoshihiro Kambayashi)
test/ruby/test_transcode.rb: added tests for the above (from Yoshihiro Kambayashi)
transcode_data.h, transcode.c, tool/transcode_tblgen.rb: added support for GB18030-specific 4-byte sequences (with Yoshihiro Kambayashi)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21560 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r21509 and r21512 from trunk into ruby_1_9_1.
enc/trans/gb18030.trans, gb18030-tbl.rb:
new Chinese GB18030 transcoding (from Yoshihiro Kambayashi)
test/ruby/test_transcode.rb: added tests for the above
(from Yoshihiro Kambayashi)
transcode_data.h, transcode.c, tool/transcode_tblgen.rb:
added support for GB18030-specific 4-byte sequences
(with Yoshihiro Kambayashi)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21560 b2dd03c8-39d4-4d8f-98ff-823fe69b080e