[llvm] DeveloperPolicy: Update commit access requirements (PR #127006)

[Tom Stellard via llvm-commits]

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@@ -539,11 +539,13 @@ What are the expectations around a revert?
 Obtaining Commit Access
 -----------------------
 
-We grant commit access to contributors that can provide a valid justification.
-If you would like commit access, please use this `link <https://github.com/llvm/llvm-project/issues/new?title=Request%20Commit%20Access%20For%20%3Cuser%3E&body=%23%23%23%20Why%20Are%20you%20requesting%20commit%20access%20?>`_ to file
+Once you have 3 or more merged pull requests, you may use this
+link <https://github.com/llvm/llvm-project/issues/new?title=Request%20Commit%20Access%20For%20%3Cuser%3E&body=%23%23%23%20Why%20Are%20you%20requesting%20commit%20access%20?>`_ to file
 an issue and request commit access. Replace the <user> string in the title
 with your github username, and explain why you are requesting commit access in
-the issue description. If approved, a GitHub invitation will be sent to your
+the issue description.  Once the issue is created, you will need to get two
+current contributors to ack your requests before commit access will be granted.
----------------
tstellar wrote:

@asb It's a good question.  For me, the ack means 1) I know this person and 2) I believe they will adhere to our Developer Policy/Code of Conduct. 

https://github.com/llvm/llvm-project/pull/127006