repo: Clang-format LVL source files using Google

Switch clang-format standard from the LLVM style to the
Google style for more consistency.

Change-Id: I247c4abc275d7873a91522e1e234198adaa24033
diff --git a/layers/buffer_validation.h b/layers/buffer_validation.h
index b8c094d..a5fd396 100644
--- a/layers/buffer_validation.h
+++ b/layers/buffer_validation.h
@@ -31,4 +31,4 @@
                                std::unordered_map<ImageSubresourcePair, IMAGE_LAYOUT_NODE> *imageLayoutMap,
                                const VkImageCreateInfo *pCreateInfo, VkImage *pImage);
 
-#endif // CORE_VALIDATION_BUFFER_VALIDATION_H_
+#endif  // CORE_VALIDATION_BUFFER_VALIDATION_H_