Re-sort #include lines for unittests. This uses a slightly modified
clang-format (https://reviews.llvm.org/D33932) to keep primary headers
at the top and handle new utility headers like 'gmock' consistently with
other utility headers.

No other change was made. I did no manual edits, all of this is
clang-format.

This should allow other changes to have more clear and focused diffs,
and is especially motivated by moving some headers into more focused
libraries.

llvm-svn: 304786
diff --git a/llvm/unittests/Analysis/BranchProbabilityInfoTest.cpp b/llvm/unittests/Analysis/BranchProbabilityInfoTest.cpp
index cbf8b50..529af5c 100644
--- a/llvm/unittests/Analysis/BranchProbabilityInfoTest.cpp
+++ b/llvm/unittests/Analysis/BranchProbabilityInfoTest.cpp
@@ -13,8 +13,8 @@
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Dominators.h"
-#include "llvm/IR/Instructions.h"
 #include "llvm/IR/Function.h"
+#include "llvm/IR/Instructions.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/DataTypes.h"