[test] Fix test regressions in backdeployment bots

[lorentey]

#34665 changed trap messages in debug builds, but the new format obviously doesn't apply in back deployment scenarios.

Resolves rdar://71902574.

[lorentey]

@swift-ci test

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 20f807ba37a8b6968bb783ba7fa5adde96729f8a

[swift-ci]

Build failed
Swift Test OS X Platform
Git Sha - 20f807ba37a8b6968bb783ba7fa5adde96729f8a

[lorentey]

[ RUN      ] OptionalTraps.UnwrapNone/location
stderr>>> Assert_Debug/OptionalTraps.swift:57: Fatal error: Unexpectedly found nil while unwrapping an Optional value
stderr>>> Current stack trace:
stderr>>> 0    libswiftCore.dylib                 0x0000000109c55980 _swift_stdlib_reportFatalErrorInFile + 109
stderr>>> 1    libswiftCore.dylib                 0x000000010988f990 closure #1 in closure #1 in closure #1 in _assertionFailure(_:_:file:line:flags:) + 478
stderr>>> 2    libswiftCore.dylib                 0x000000010988fe50 closure #1 in closure #1 in _assertionFailure(_:_:file:line:flags:) + 110
stderr>>> 3    libswiftCore.dylib                 0x000000010988f720 closure #1 in _assertionFailure(_:_:file:line:flags:) + 128
stderr>>> 4    libswiftCore.dylib                 0x000000010988f210 _assertionFailure(_:_:file:line:flags:) + 414
stderr>>> 5    Assert_Debug                       0x0000000109829d60 closure #4 in  + 258
stderr>>> 6    libswiftStdlibUnittest.dylib       0x000000010a481700 TestSuite._runTest(name:parameter:) + 943
stderr>>> 7    libswiftStdlibUnittest.dylib       0x000000010a480240 _childProcess() + 1121
stderr>>> 8    Assert_Debug                       0x0000000109828f20 main + 3135
stderr>>> 9    libdyld.dylib                      0x00007fff7099ecc8 start + 1
stderr>>> OK: saw expected "crashed: sigill"
did not find expected string after crash: "OptionalTraps.swift:45:"
[     FAIL ] OptionalTraps.UnwrapNone/location

[lorentey]

[ RUN      ] Error.try!/location
stderr>>> main/Error.swift:140: Fatal error: 'try!' expression unexpectedly raised an error: main.SillyError.JazzHands
stderr>>> Current stack trace:
stderr>>> 0    libswiftCore.dylib                 0x0000000105a13980 _swift_stdlib_reportFatalErrorInFile + 109
stderr>>> 1    libswiftCore.dylib                 0x000000010564e0b0 closure #1 in closure #1 in closure #1 in _assertionFailure(_:_:file:line:flags:) + 243
stderr>>> 2    libswiftCore.dylib                 0x000000010564de50 closure #1 in closure #1 in _assertionFailure(_:_:file:line:flags:) + 110
stderr>>> 3    libswiftCore.dylib                 0x000000010564e2d0 specialized String.withUTF8<A>(_:) + 169
stderr>>> 4    libswiftCore.dylib                 0x000000010564cf40 _assertionFailure(_:_:file:line:flags:) + 443
stderr>>> 5    libswiftCore.dylib                 0x00000001056a9c40 swift_unexpectedError + 216
stderr>>> 6    Error                              0x00000001055e0940 closure #8 in  + 137
stderr>>> 7    libswiftStdlibUnittest.dylib       0x000000010624c700 TestSuite._runTest(name:parameter:) + 943
stderr>>> 8    libswiftStdlibUnittest.dylib       0x000000010624b240 _childProcess() + 1121
stderr>>> 9    Error                              0x00000001055db470 main + 4335
stderr>>> 10   libdyld.dylib                      0x00007fff7099ecc8 start + 1
stderr>>> OK: saw expected "crashed: sigill"
did not find expected string after crash: "main/Error.swift:128"
[     FAIL ] Error.try!/location

[lorentey]

Ah, it turns out that inserting new lines may have the side effect of changing the line numbers. Fascinating

[lorentey]

@swift-ci test

[swift-ci]

Build failed
Swift Test OS X Platform
Git Sha - 634c582

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 634c582

[lorentey]

@swift-ci test