Propagate Swift version information to the back-deployed binaries

Author: DougGregor

utils/swift_build_support/swift_build_support/products/backdeployconcurrency.py

@@ -84,6 +84,13 @@ def build(self, host_target):
         self.cmake_options.define('SWIFT_HOST_VARIANT_ARCH:STRING', arch)
         self.cmake_options.define('BUILD_STANDALONE:BOOL', True)
 
+        # Propagate version information
+        if self.args.swift_user_visible_version is not None:
+            self.cmake_options.define('SWIFT_VERSION', str(self.args.swift_user_visible_version))
+        if self.args.swift_compiler_version is not None:
+            self.cmake_options.define('SWIFT_COMPILER_VERSION', str(self.args.swift_compiler_version))
+
+
         # Only install the "stdlib" component, which contains the concurrency
         # module.
         self.cmake_options.define('SWIFT_INSTALL_COMPONENTS:STRING', 'back-deployment')