Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.

This update was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP
      done
      mv $TEMP $NAME
    fi
  done


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LoopSimplify/preserve-scev.ll

@@ -50,7 +50,7 @@ return:                                           ; preds = %for.body18, %for.bo
 declare void @foo() nounwind
 
 ; Notify SCEV when removing an ExitingBlock.
-; CHECK: @mergeExit
+; CHECK-LABEL: @mergeExit(
 ; CHECK: while.cond191:
 ; CHECK: br i1 %or.cond, label %while.body197
 ; CHECK-NOT: land.rhs: