tests:Update InvalidMemoryAliasing for warning

The aliasing check was moved from error to warning to updating the test
to match.
diff --git a/tests/layer_validation_tests.cpp b/tests/layer_validation_tests.cpp
index 470f8f6..795fdee 100644
--- a/tests/layer_validation_tests.cpp
+++ b/tests/layer_validation_tests.cpp
@@ -1358,7 +1358,7 @@
     err = vkBindBufferMemory(m_device->device(), buffer, mem, 0);
     ASSERT_VK_SUCCESS(err);
 
-    m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_ERROR_BIT_EXT, " is aliased with linear buffer 0x");
+    m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_WARNING_BIT_EXT, " is aliased with linear buffer 0x");
     // VALIDATION FAILURE due to image mapping overlapping buffer mapping
     err = vkBindImageMemory(m_device->device(), image, mem, 0);
     m_errorMonitor->VerifyFound();
@@ -1371,7 +1371,7 @@
     ASSERT_VK_SUCCESS(err);
     err = vkBindImageMemory(m_device->device(), image2, mem_img, 0);
     ASSERT_VK_SUCCESS(err);
-    m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_ERROR_BIT_EXT, "is aliased with non-linear image 0x");
+    m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_WARNING_BIT_EXT, "is aliased with non-linear image 0x");
     err = vkBindBufferMemory(m_device->device(), buffer2, mem_img, 0);
     m_errorMonitor->VerifyFound();