Fix signal order tests timeline semaphore value

The new timeline semaphore value must be greater than the current value
of the semaphore

Components: Vulkan

VK-GL-CTS issue: 3978

Affected tests:
dEQP-VK.synchronization.signal_order.*

Change-Id: I7f1276dda7739f7817148550fd1b0782d9045849
diff --git a/external/vulkancts/modules/vulkan/synchronization/vktSynchronizationSignalOrderTests.cpp b/external/vulkancts/modules/vulkan/synchronization/vktSynchronizationSignalOrderTests.cpp
index 87c2de1..0b1ac2b 100644
--- a/external/vulkancts/modules/vulkan/synchronization/vktSynchronizationSignalOrderTests.cpp
+++ b/external/vulkancts/modules/vulkan/synchronization/vktSynchronizationSignalOrderTests.cpp
@@ -859,7 +859,7 @@
 				};
 
 				// Unblock the whole lot.
-				hostSignal(vkA, deviceA, semaphoreHandlesA.front(), 1);
+				hostSignal(vkA, deviceA, semaphoreHandlesA.front(), 2);
 
 				VK_CHECK(vkB.waitSemaphores(*deviceB, &waitInfo, ~0ull));
 			}