message: update placed alloc test to accommodate #user alloc change
diff: @@ -441,6 +441,7 @@ TEST(Jit, JitPlacedAlloc) {
  key: "bufA"
  value {
  loc {}
  + attrs: { key: "user" value: {} }
  dir: 3
  access { offset: 0 terms {key:"j" value:1} }
  interior_shape { type: FLOAT32 dims: {size:5 stride:1} }
  @@ -450,6 +451,7 @@ TEST(Jit, JitPlacedAlloc) {
  key: "bufB"
  value {
  loc {}
  + attrs: { key: "user" value: {} }
  dir: 3
  agg_op: "add"
  access { offset: 0 terms {key:"i" value:1} }
  