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/Mem2Reg/atomic.ll

@@ -3,7 +3,7 @@
 ; mem2reg is allowed with arbitrary atomic operations (although we only support
 ; it for atomic load and store at the moment).
 define i32 @test1(i32 %x) {
-; CHECK: @test1
+; CHECK-LABEL: @test1(
 ; CHECK: ret i32 %x
   %a = alloca i32
   store atomic i32 %x, i32* %a seq_cst, align 4