Function LLVMBuildStructGEP2 

#[unsafe(no_mangle)]
pub extern "C" fn LLVMBuildStructGEP2(
    B: LLVMBuilderRef,
    Ty: LLVMTypeRef,
    Pointer: LLVMValueRef,
    Idx: c_uint,
    Name: *const c_char,
) -> LLVMValueRef