Adapt to IRBuilder::CreateCall interface change

The IRBuilder::CreateCall interface was changed in r237624 and now requires an
initializer list.

llvm-svn: 237666
diff --git a/polly/lib/CodeGen/LoopGenerators.cpp b/polly/lib/CodeGen/LoopGenerators.cpp
index f0cdc81..3bb61fa 100644
--- a/polly/lib/CodeGen/LoopGenerators.cpp
+++ b/polly/lib/CodeGen/LoopGenerators.cpp
@@ -235,7 +235,7 @@
     F = Function::Create(Ty, Linkage, Name, M);
   }
 
-  Builder.CreateCall(F);
+  Builder.CreateCall(F, {});
 }
 
 void ParallelLoopGenerator::createCallCleanupThread() {
@@ -251,7 +251,7 @@
     F = Function::Create(Ty, Linkage, Name, M);
   }
 
-  Builder.CreateCall(F);
+  Builder.CreateCall(F, {});
 }
 
 Function *ParallelLoopGenerator::createSubFnDefinition() {