/test cases/swift/

• ../
• 1 exe
• 10 file name matches module name
• 11 mixed cpp
• 12 c std passthrough
• 13 mixed objcpp
• 14 single-file library
• 15 main in single-file library
• 16 main in multi-file library
• 2 multifile
• 3 library
• 4 generate
• 5 mixed
• 6 modulemap
• 7 modulemap subdir
• 8 extra args
• 9 sdk path from dep