Fix unstable sapi test, fix GH-9140

Author: mvorisek

sapi/cgi/cgi_main.c

@@ -2271,6 +2271,7 @@ consult the installation file that came with this distribution, or visit \n\
 
 						case 'a':	/* interactive mode */
 							printf("Interactive mode enabled\n\n");
+							fflush(stdout);
 							break;
 
 						case 'C': /* don't chdir to the script directory */

sapi/cgi/tests/005.phpt

@@ -23,12 +23,12 @@ var_dump(`$php -n -f 'wrong' -a`);
 echo "Done\n";
 ?>
 --EXPECT--
-string(51) "No input file specified.
-Interactive mode enabled
+string(51) "Interactive mode enabled
 
+No input file specified.
 "
-string(51) "No input file specified.
-Interactive mode enabled
+string(51) "Interactive mode enabled
 
+No input file specified.
 "
 Done