layers: Add VU enums to core_validation.cpp

(Completes Jira VL-62)
Add new VU enums to core_validation (part 4 of 5). Update database
to reflect changes. Small edit to InvalidPushConstants test in
layer_validation_tests.cpp to update error message text.

Change-Id: I05800c9e783d66ef41e92c4af1d2f2e9eb8b9270
diff --git a/tests/layer_validation_tests.cpp b/tests/layer_validation_tests.cpp
index c94e6d6..19d0a10 100644
--- a/tests/layer_validation_tests.cpp
+++ b/tests/layer_validation_tests.cpp
@@ -6345,11 +6345,11 @@
     const std::array<PipelineLayoutTestCase, 11> cmd_range_tests = {{
         {{VK_SHADER_STAGE_VERTEX_BIT, 0, 0}, "vkCmdPushConstants: parameter size must be greater than 0"},
         {{VK_SHADER_STAGE_VERTEX_BIT, 0, 1},
-         "vkCmdPushConstants() call has push constants with size 1. Size "
-         "must be greater than zero and a multiple of 4."},
+         "vkCmdPushConstants() call has push constants index 0 with size 1. "
+         "Size must be a multiple of 4."},
         {{VK_SHADER_STAGE_VERTEX_BIT, 4, 1},
-         "vkCmdPushConstants() call has push constants with size 1. Size "
-         "must be greater than zero and a multiple of 4."},
+         "vkCmdPushConstants() call has push constants index 0 with size 1. "
+         "Size must be a multiple of 4."},
         {{VK_SHADER_STAGE_VERTEX_BIT, 1, 4},
          "vkCmdPushConstants() call has push constants with offset 1. "
          "Offset must be a multiple of 4."},