Install gemspec even though no .rb and no .so
When building with --with-static-linked-ext, some exts without rb file doesn't produce neither .so or .rb under .ext/common. Therefore, change rbinstall.rb to install gemspec even if there is no .so or .rb for that case.
Added by katei (Yuta Saito) almost 4 years ago
Install gemspec even though no .rb and no .so
When building with --with-static-linked-ext, some exts without rb file
doesn't produce neither .so or .rb under .ext/common. Therefore, change
rbinstall.rb to install gemspec even if there is no .so or .rb for that
case.