ASM

Linter reports variables used only in assembly as unused.

Consider this very common code used in crypto libraries:
```
test.go:

import "golang.org/x/sys/cpu"
var hasBoth = cpu.HasBMI2 && cpu.HasADX
```

```
test.s

CMPB hasBoth
JE jump_to_optimized_implementation
....
```

linter will report hasBoth is not used, where it actually is