kernel: Adapt to low version Android init process (#973)

1. Adapt to low version Android init process
2. Add stop hook output
3. Fix output with missing line breaks

kernel/manager.c

@@ -52,7 +52,7 @@ bool become_manager(char *pkg)
 			continue;
 		}
 		// we have found the apk!
-		pr_info("found apk: %s", cwd);
+		pr_info("found apk: %s\n", cwd);
 		char *pkg_index = strstr(cwd, pkg);
 		if (!pkg_index) {
 			pr_info("apk path not match package name!\n");
@@ -80,7 +80,7 @@ bool become_manager(char *pkg)
 			result = true;
 			goto clean;
 		} else {
-			pr_info("manager signature invalid!");
+			pr_info("manager signature invalid!\n");
 		}
 
 		break;