Remove some 'const' specifiers that do nothing but prevent moving the argument.

Found by clang-tidy's misc-move-const-arg. While there drop some
obsolete c_str() calls.

llvm-svn: 271181
diff --git a/llvm/lib/Transforms/Utils/LoopVersioning.cpp b/llvm/lib/Transforms/Utils/LoopVersioning.cpp
index e3f711f..736d79a 100644
--- a/llvm/lib/Transforms/Utils/LoopVersioning.cpp
+++ b/llvm/lib/Transforms/Utils/LoopVersioning.cpp
@@ -44,7 +44,7 @@
 }
 
 void LoopVersioning::setAliasChecks(
-    const SmallVector<RuntimePointerChecking::PointerCheck, 4> Checks) {
+    SmallVector<RuntimePointerChecking::PointerCheck, 4> Checks) {
   AliasChecks = std::move(Checks);
 }