.gitignore: ignore run.gdb
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59680 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
.gitignore: ignore run.gdb
by make gdb and customized manually during development
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59680 b2dd03c8-39d4-4d8f-98ff-823fe69b080e