fix CI lit test on Windows

Signed-off-by: chenwei.sun <chenwei.sun@intel.com>

Author: tomflinda

clang/test/dpct/cmake_migration/case_068/migration_ref.log

@@ -1,4 +1,4 @@
 // CHECK: Warning: Only CMake scripts will be migrated as no --migrate-build-script option is provided.
 // CHECK: dpct exited with code: 4 (Migration of build script(s) completed.)
 // CHECK: [Warning]: Two migration rules (Rule:implicit_rule_execute_process, Rule:rule_execute_process) are duplicated, the migration rule (Rule:implicit_rule_execute_process) is ignored.
-// CHECK: Processing: {{(.+)}}/cmake_migration/case_068/Output/out/input.cmake
+// CHECK: Processing: {{(.+)}}input.cmake