[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.

As agreed in post-commit review of r265388, I'm switching the flag to
its original value until the 90% runtime performance regression on
SingleSource/Benchmarks/Stanford/Bubblesort is addressed.

llvm-svn: 277524
diff --git a/llvm/test/Transforms/LoopUnroll/runtime-loop4.ll b/llvm/test/Transforms/LoopUnroll/runtime-loop4.ll
index 8f15891..4a9104e 100644
--- a/llvm/test/Transforms/LoopUnroll/runtime-loop4.ll
+++ b/llvm/test/Transforms/LoopUnroll/runtime-loop4.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -S -O2 -unroll-runtime=true | FileCheck %s -check-prefix=EPILOG
+; RUN: opt < %s -S -O2 -unroll-runtime=true -unroll-runtime-epilog=true  | FileCheck %s -check-prefix=EPILOG
 ; RUN: opt < %s -S -O2 -unroll-runtime=true -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
 
 ; Check runtime unrolling prologue can be promoted by LICM pass.