new features:
- cmd/gop: gop c2go (support c2go, macOS/linux only)
- cl: import "C" (support libc, macOS only)
- cl: import "C/xxx"
- parser/scanner/printer: support CSTRING literal
- example: use C.printf, C.fprintf and C.stderr
incompatible changes:
- gengo: return recursively or not
changes:
- cmd/gop: rm base.RunGoCmd (use gop/x/gocmd please)
- parser: newTwoFileFS => parsertest.NewTwoFilesFS
- gengo: skip dir with prefix _
- mod: libc v0.3.5
- mod: c2go v0.7.1
- mod: gox v1.11.7