New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/14656#issuecomment-534550940

Comment:
As I see it,

```
Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());
```

will need changing to

```
Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType()).getCallee();
```

in two places in that file when compiling for llvm9.