Crash when printing version when building with Swift Package Manager

[jpsim]

"Getting bundles on Linux can't be broken! We use it to print the version and that surely works"

[goes to confirm]

.build/debug/swiftlint version
fatal error: unexpectedly found nil while unwrapping an Optional value
Current stack trace:
0    libswiftCore.so                    0x00007fc4f9554fc0 swift_reportError + 117
1    libswiftCore.so                    0x00007fc4f9567df0 _swift_stdlib_reportFatalError + 63
2    libswiftCore.so                    0x00007fc4f93756a3 <unavailable> + 0
3    libswiftCore.so                    0x00007fc4f94d2dfd <unavailable> + 0
4    libswiftCore.so                    0x00007fc4f93756a3 <unavailable> + 0
5    libswiftCore.so                    0x00007fc4f94946b0 specialized _fatalErrorMessage(StaticString, StaticString, StaticString, UInt, flags : UInt32) -> Never + 96
6    swiftlint                          0x000000000042c086 <unavailable> + 0
7    libpthread.so.0                    0x00007fc4f858cae9 <unavailable> + 0
8    libswiftCore.so                    0x00007fc4f9565b20 swift_once + 90
9    swiftlint                          0x000000000042c16a <unavailable> + 0
10   swiftlint                          0x000000000042c1e9 <unavailable> + 0
11   swiftlint                          0x000000000042c6b6 <unavailable> + 0
12   swiftlint                          0x0000000000447285 <unavailable> + 0
13   swiftlint                          0x000000000044b0c1 <unavailable> + 0
14   swiftlint                          0x000000000044865f <unavailable> + 0
15   swiftlint                          0x0000000000448fc4 <unavailable> + 0
16   swiftlint                          0x0000000000448ac1 <unavailable> + 0
17   swiftlint                          0x0000000000416b91 <unavailable> + 0
18   swiftlint                          0x0000000000416cd7 <unavailable> + 0
19   libdispatch.so                     0x00007fc4f974c2a7 <unavailable> + 0
20   libdispatch.so                     0x00007fc4f975b152 <unavailable> + 0
21   libdispatch.so                     0x00007fc4f978361f <unavailable> + 0
22   libpthread.so.0                    0x00007fc4f858570a <unavailable> + 0
23   libc.so.6                          0x00007fc4f73de7c0 clone + 109
Illegal instruction

💥

---

Relevant conversation: #1044 (comment)

[jpsim]

Done in #1134.