Subzero: Use a "known" version of clang-format.

src/IceTargetLowering.cpp

Index: src/IceTargetLowering.cpp
diff --git a/src/IceTargetLowering.cpp b/src/IceTargetLowering.cpp
index 4373c6c7828bb9519d5d1f159d1cac6fbda0084b..27a2d6031b352ce82bf0ee0a40e8f3902543c4a1 100644
--- a/src/IceTargetLowering.cpp
+++ b/src/IceTargetLowering.cpp
@@ -43,9 +43,9 @@ cl::opt<int> NopProbabilityAsPercentage(
     cl::desc("Nop insertion probability as percentage"), cl::init(10));
 
 cl::opt<bool>
-CLRandomizeRegisterAllocation("randomize-regalloc",
-                              cl::desc("Randomize register allocation"),
-                              cl::init(false));
+    CLRandomizeRegisterAllocation("randomize-regalloc",
+                                  cl::desc("Randomize register allocation"),
+                                  cl::init(false));
 } // end of anonymous namespace
 
 void LoweringContext::init(CfgNode *N) {