Commands: be more explicit about dependencies

On Swift-Foundation targets, FoundationXML is required.  When building
against a custom Foundation and a SDK which does not have Foundation,
FoundationXML will not be tracked properly without the explicit linkage.

Author: compnerd

Sources/Commands/CMakeLists.txt

@@ -32,6 +32,10 @@ target_link_libraries(Commands PUBLIC
   Workspace
   XCBuildSupport
   Xcodeproj)
+if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  target_link_libraries(Commands PUBLIC
+    FoundationXML)
+endif()
 # NOTE(compnerd) workaround for CMake not setting up include flags yet
 set_target_properties(Commands PROPERTIES
   INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_Swift_MODULE_DIRECTORY})