[tsan] Avoid ALIGNED in tsan_platform_mac.cpp. NFC

Author: MaskRay

compiler-rt/lib/tsan/rtl/tsan_platform_mac.cpp

@@ -46,8 +46,8 @@
 namespace __tsan {
 
 #if !SANITIZER_GO
-static char main_thread_state[sizeof(ThreadState)] ALIGNED(
-    SANITIZER_CACHE_LINE_SIZE);
+alignas(SANITIZER_CACHE_LINE_SIZE) static char main_thread_state[sizeof(
+    ThreadState)];
 static ThreadState *dead_thread_state;
 static pthread_key_t thread_state_key;