Increase slop time on MSVC in PerThreadSemTest.Timeouts again due to continued flakiness.

PiperOrigin-RevId: 643372086
Change-Id: I8fb2acc0e5ad35113e865bf008a531f3442a9295

absl/synchronization/internal/per_thread_sem_test.cc

@@ -162,7 +162,7 @@ TEST_F(PerThreadSemTest, Timeouts) {
   absl::Duration slop = absl::Milliseconds(1);
   absl::Duration slop = absl::Milliseconds(1);
 #ifdef _MSC_VER
 #ifdef _MSC_VER
   // Use higher slop on MSVC due to flaky test failures.
   // Use higher slop on MSVC due to flaky test failures.
-  slop = absl::Milliseconds(8);
+  slop = absl::Milliseconds(16);
 #endif
 #endif
   EXPECT_LE(delay - slop, elapsed)
   EXPECT_LE(delay - slop, elapsed)
       << "Wait returned " << delay - elapsed
       << "Wait returned " << delay - elapsed