Merge pull request #18271 from ahoppen/swift-swiftsyntax-build-issue

[swiftSyntax] Fix an issue that caused swift-swiftsyntax-test to not be generated by Xcode

Author: ahoppen

tools/swift-swiftsyntax-test/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_swift_host_tool(swift-swiftsyntax-test
   main.swift
   CommandLineArguments.swift 
+  empty.c # FIXME: If there is no C file in the target Xcode skips the linking phase and doesn't create the executable
   COMPILE_FLAGS "-module-name" "main"
   DEPENDS 
     swiftSwiftSyntax-macosx

tools/swift-swiftsyntax-test/empty.c

@@ -0,0 +1 @@
+