[off-topic] Readme.md: add submodule policy and clone commands

["Laszlo Ersek" <lersek@redhat.com>]

(off-topic, as marked in the subject)

On 07/10/19 19:17, Leif Lindholm wrote:
> On Wed, Jul 10, 2019 at 05:08:32PM +0000, Kinney, Michael D wrote:
>> Leif,
>>
>> I think the following command has to be run from the git
>> dir that the edk2 repo was cloned into.
>> 	
>> $ git submodule update --init
>>
>> So I think the correct instructions would be:
>>
>> $ git clone https://github.com/tianocore/edk2.git
>> $ cd edk2
>> $ git submodule update --init
> 
> I only said I reviewed it, not that the review was correct ;)
> 
> Yeah, good catch. I just mentally filtered out the clone bit.
> 
>> $ cd ..
> 
> Why would you want to leave? 

Heh, that's a good one :) Reminds me of a blog post or similar where the
question was posed (tongue-in-cheek of course), "why boot at all? UEFI
gives you everything!" :)

Thanks!
Laszlo