Workaround for gtest-related breakage: https://github.com/facebook/hermes/issues/388

--- external/llvh/CMakeLists.txt.orig	2024-08-15 07:17:16 UTC
+++ external/llvh/CMakeLists.txt
@@ -31,4 +31,4 @@ add_subdirectory(utils/count)
 add_subdirectory(utils/FileCheck)
 add_subdirectory(utils/not)
 add_subdirectory(utils/count)
-add_subdirectory(utils/unittest)
+#add_subdirectory(utils/unittest)