Amend type of new build-script flag in tests

Author: edymtt

utils/build_swift/tests/expected_options.py

@@ -854,7 +854,7 @@ class BuildScriptImplOption(_BaseOption):
     AppendOption('--llvm-ninja-targets'),
     AppendOption('--llvm-ninja-targets-for-cross-compile-hosts'),
     AppendOption('--llvm-cmake-options'),
-    SetTrueOption('--llvm-build-compiler-rt-with-use-runtimes'),
+    EnableOption('--llvm-build-compiler-rt-with-use-runtimes'),
     AppendOption('--darwin-symroot-path-filters'),
 
     UnsupportedOption('--build-jobs'),