IncludeBlocks: Preserve

Test: clang-format no longer reorder blocks

Change-Id: Ib5060a5c5cddad7f003f64bc3d59671db77fa224
diff --git a/.clang-format b/.clang-format
index c1244fe..3b6a627 100644
--- a/.clang-format
+++ b/.clang-format
@@ -34,5 +34,6 @@
 BinPackParameters: false
 CommentPragmas: NOLINT:.*
 DerivePointerAlignment: false
+IncludeBlocks: Preserve
 PointerAlignment: Left
 TabWidth: 2