external: Update glslang commit ID, fix LVT

Updated glslang revision to TOT, fixed layer validation test for
new spirv-validator message output.

Change-Id: I8c31d6cfc09cf73f4235b2159e3fe4e6ec289330
diff --git a/external_revisions/glslang_revision b/external_revisions/glslang_revision
index 133bece..4eaed0b 100644
--- a/external_revisions/glslang_revision
+++ b/external_revisions/glslang_revision
@@ -1 +1 @@
-715c353a15836e5ae192a64a4cf54e2ce7e8d66a
+2651ccaec8
diff --git a/tests/layer_validation_tests.cpp b/tests/layer_validation_tests.cpp
index 8ca1ade..2f08071 100644
--- a/tests/layer_validation_tests.cpp
+++ b/tests/layer_validation_tests.cpp
@@ -16026,7 +16026,8 @@
         "   gl_Position = vec4(1);\n"
         "}\n";
 
-    m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_ERROR_BIT_EXT, "Capability value 53 is not allowed by Vulkan");
+    m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_ERROR_BIT_EXT,
+                                         "Capability TransformFeedback is not allowed by Vulkan");
 
     std::vector<unsigned int> spv;
     VkShaderModuleCreateInfo module_create_info;