[SR-961] Implement SE-0046: Establish consistent label behavior across all parameters including first labels

[lattner]

Previous ID	SR-961
Radar	None
Original Reporter	@lattner
Type	Task
Status	Closed
Resolution	Done

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Task
Assignee	manav (JIRA)
Priority	Medium

md5: d7494dc680dd50eda630da95cdd58512

Issue Description:

SE-0046 has been accepted:
https://github.com/apple/swift-evolution/blob/master/proposals/0046-first-label.md

This tracks implementation work.

[tkremenek]

Also tracked by rdar://problem/25279084.

[swift-ci]

Comment by Manav Gabhawala (JIRA)

#2047