Implement printing of int8/uint8/pointers

src/runtime/runtime.go

@@ -3,6 +3,9 @@ package runtime
 
 const Compiler = "tgo"
 
+// The bitness of the CPU (e.g. 8, 32, 64). Set by the compiler as a constant.
+var TargetBits uint8
+
 func _panic(message interface{}) {
 	printstring("panic: ")
 	printitf(message)