[SR-14521] wrong `RUNPATH` in `libPackagePlugin.so` library in recent nightly toolchains

[tayloraswift]

Previous ID	SR-14521
Radar	rdar://problem/77076996
Original Reporter	@Kelvin13
Type	Bug
Status	Closed
Resolution	Done

Environment

$ swift --version
Swift version 5.5-dev (LLVM fb5a91b4e892ed9, Swift f17142883421ec0)
Target: x86_64-unknown-linux-gnu

Additional Detail from JIRA

Votes	0
Component/s	Package Manager
Labels	Bug
Assignee	None
Priority	Medium

md5: d251a628fec823d06e04b360bae20269

Issue Description:

currently, with the most recent nightly toolchain (`2021-04-18-a`), package plugins do not work due to a wrong `RUNPATH` in the `libPackagePlugin.so` binary.

the `RUNPATH` is currently:

$ORIGIN/../../linux

it should be:

$ORIGIN/../linux

changing the RUNPATH to the correct destination using a tool like `chrpath` fixes the issue.

see this forum post for more details

[typesanitizer]

@swift-ci create

[finagolfin]

This was fixed by Anders last month:

#3464

Please verify that it now works and close the issue if so. A pull was just merged to get that change into the 5.5 branch too.