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/LoopStrengthReduce/2011-12-19-PostincQuadratic.ll

@@ -9,7 +9,7 @@ target triple = "i386-unknown-freebsd10.0"
 
 @b = external global [121 x i32]
 
-; CHECK: @vb
+; CHECK-LABEL: @vb(
 ;   Outer recurrence:
 ; CHECK: %lsr.iv1 = phi [121 x i32]*
 ;   Inner recurrence: