Compile `mruby-bin-debugger` with `ci/gcc-clang.rb`.
MODIFY
build_config/ci/gcc-clang.rb
build_config/ci/gcc-clang.rb
@@ -16,6 +16,7 @@ MRuby::Build.new do |conf|
# include all core GEMs
conf.gembox 'full-core'
+ conf.gem :core => 'mruby-bin-debugger'
conf.compilers.each do |c|
c.defines += %w(MRB_GC_FIXED_ARENA)
end

Compile `mruby-bin-debugger` with `ci/gcc-clang.rb`.