Function rustc_llvm_proxy::proxy::LLVMGetStringAttributeAtIndex

#[no_mangle]
pub unsafe extern "C" fn LLVMGetStringAttributeAtIndex(
    F: LLVMValueRef,
    Idx: LLVMAttributeIndex,
    K: *const c_char,
    KLen: c_uint
) -> LLVMAttributeRef