ruby.rpmlintrc: Ignore non executable template files for Bundler.
The template files do not have to have executable bits.
Ignore the following errors.
```
rubygem-bundler.noarch: E: non-executable-script /usr/share/gems/gems/bundler-2.2.15/lib/bundler/templates/Executable 644 /usr/bin/env <%= Bundler.settings[:shebang] || RbConfig::CONFIG["ruby_install_name"] %>
rubygem-bundler.noarch: E: non-executable-script /usr/share/gems/gems/bundler-2.2.15/lib/bundler/templates/Executable.bundler 644 /usr/bin/env <%= Bundler.settings[:shebang] || RbConfig::CONFIG["ruby_install_name"] %>
rubygem-bundler.noarch: E: non-executable-script /usr/share/gems/gems/bundler-2.2.15/lib/bundler/templates/Executable.standalone 644 /usr/bin/env <%= Bundler.settings[:shebang] || RbConfig::CONFIG["ruby_install_name"] %>
rubygem-bundler.noarch: E: non-executable-script /usr/share/gems/gems/bundler-2.2.15/lib/bundler/templates/newgem/bin/console.tt 644 /usr/bin/env ruby
rubygem-bundler.noarch: E: non-executable-script /usr/share/gems/gems/bundler-2.2.15/lib/bundler/templates/newgem/bin/setup.tt 644 /usr/bin/env bash
rubygem-bundler.noarch: E: non-executable-script /usr/share/gems/gems/bundler-2.2.15/lib/bundler/templates/newgem/exe/newgem.tt 644 /usr/bin/env ruby
```