rm internal/runtime/c; mv internal/runtime/bdwgc => c/bdwgc

c/c.go

@@ -77,6 +77,9 @@ func Memset(s Pointer, c Int, n uintptr) Pointer
 //go:linkname GoStringData llgo.stringData
 func GoStringData(string) *Char
 
+//go:linkname GoDeferData llgo.deferData
+func GoDeferData() Pointer
+
 // -----------------------------------------------------------------------------
 
 //go:linkname AllocaSigjmpBuf llgo.sigjmpbuf