[SR-10485] Use of unresolved identifier 'POSIXErrorCode' on Linux

[colemancda]

Previous ID	SR-10485
Radar	None
Original Reporter	@colemancda
Type	Bug
Status	Resolved
Resolution	Done

Environment

Swift 5.0 Ubuntu 18.04

Additional Detail from JIRA

Votes	0
Component/s	Standard Library
Labels	Bug
Assignee	@colemancda
Priority	Medium

md5: 3d74ff2aa87c46e95add0f1635280242

Issue Description:

`POSIXErrorCode` should be defined for Darwin and Linux since 8157194#diff-c86969eead9d9f63ad0faa3e75802e66R268

For some reason it is not defined even when importing Glibc on Linux.

[colemancda]

Fixed in #24028

[colemancda]

Affects

swiftlang/swift-corelibs-foundation#2113

PureSwift/Bluetooth#122

[colemancda]

Fixed in b6ca2fb