Android: creates fifo for test runners in internal directory.

testing/android/native_test_launcher.cc

Index: testing/android/native_test_launcher.cc
diff --git a/testing/android/native_test_launcher.cc b/testing/android/native_test_launcher.cc
index 99d9b29b47120badde0f33efb68fb86fd04fb0e9..ade30b2758d99ea781f1282033631d22f426447f 100644
--- a/testing/android/native_test_launcher.cc
+++ b/testing/android/native_test_launcher.cc
@@ -118,7 +118,8 @@ int ArgsToArgv(const std::vector<std::string>& args,
 
 void CreateFIFO(const char* fifo_path) {
   unlink(fifo_path);
-  if (mkfifo(fifo_path, 0666)) {
+  // Default permissions for mkfifo is ignored, chmod is required.
+  if (mkfifo(fifo_path, 0666) || chmod(fifo_path, 0666)) {
     AndroidLogError("Failed to create fifo %s: %s\n",
                     fifo_path, strerror(errno));
     exit(EXIT_FAILURE);