legacy/builder

• ar.go
• build.go
• buildid.go
• builtins.go
• cc.go
• cc1as.cpp
• cc1as.h
• clang.cpp
• commands.go
• config.go
• elfpatch.go
• error.go
• jobs.go
• library.go
• lld.cpp
• musl.go
• objcopy.go
• size-report.go
• size-report.html
• sizes.go
• tools-builtin.go
• tools-external.go
• tools.go