Label attributes in nested structs are ignored

### Go code
```go
type WithTwoAttributesAndLabel struct {
Name string `hcl:"name,label"`
A string `hcl:"a,optional"`
B string `hcl:"b,optional"`
}

type blockWithEmbeddedStruct struct {
WithTwoAttributesAndLabel `hcl:",remain"`
}

type withNestedEmbeddedBlock struct {
Nested *blockWithEmbeddedStruct `hcl:"nested,block"`
}
```

### HCL Template
```hcl
nested "name" {
a = "value"
b = "value"
}
```

### Expected behavior
The `nested` struct should have it's Name filled out with the value `name`

### Actual behavior
The name label is ignored but all other fields work fine