bionic tests: switch to using android-base/file.h for TemporaryFile

A matching definition of TemporaryFile exists in libbase now.

Test: compile
Bug: 119313545
Change-Id: I6f84dbf3af9a9c4b270a2532a36c9cb4c0f6bb8f
diff --git a/tests/sys_msg_test.cpp b/tests/sys_msg_test.cpp
index 4eb5a14..8b3623e 100644
--- a/tests/sys_msg_test.cpp
+++ b/tests/sys_msg_test.cpp
@@ -31,7 +31,7 @@
 #include <errno.h>
 #include <sys/msg.h>
 
-#include "TemporaryFile.h"
+#include <android-base/file.h>
 
 TEST(sys_msg, smoke) {
   if (msgctl(-1, IPC_STAT, nullptr) == -1 && errno == ENOSYS) {
@@ -41,7 +41,7 @@
 
   // Create a queue.
   TemporaryDir dir;
-  key_t key = ftok(dir.dirname, 1);
+  key_t key = ftok(dir.path, 1);
   int id = msgget(key, IPC_CREAT|0666);
   ASSERT_NE(id, -1);