AIX:Proposal to use kSemaphoreAlignmentMask instead kPointerAlignmentMask

src/base/platform/semaphore.cc

Index: src/base/platform/semaphore.cc
diff --git a/src/base/platform/semaphore.cc b/src/base/platform/semaphore.cc
index 6225b1655f881fe4fe3ff47f8c1912d9d5995181..3491d3e1f93a78a3c90c25c74d459e3a4a35dfee 100644
--- a/src/base/platform/semaphore.cc
+++ b/src/base/platform/semaphore.cc
@@ -78,9 +78,8 @@ Semaphore::Semaphore(int count) {
   // Unaligned native handle can later cause a failure in semaphore signal.
   // Check the alignment here to catch the failure earlier.
   // Context: crbug.com/605349.
-  const uintptr_t kPointerAlignmentMask = sizeof(void*) - 1;
   CHECK_EQ(
-      0, reinterpret_cast<uintptr_t>(&native_handle_) & kPointerAlignmentMask);
+    0, reinterpret_cast<uintptr_t>(&native_handle_) & kSemaphoreAlignmentMask);
   DCHECK(count >= 0);
 #if V8_LIBC_GLIBC
   // sem_init in glibc prior to 2.1 does not zero out semaphores.