Attempt to unbreak the build by building Swift modules with -enable-testing.

Author: artemcm

Sources/SwiftDriver/CMakeLists.txt

@@ -93,6 +93,9 @@ add_library(SwiftDriver
   Utilities/VersionExtensions.swift
   Utilities/VirtualPath.swift)
 
+target_compile_options(SwiftDriver PUBLIC
+  $<$<COMPILE_LANGUAGE:Swift>:-enable-testing)
+
 target_link_libraries(SwiftDriver PUBLIC
   TSCBasic
   TSCUtility