Update the bug that's blocking libc++fs for vendor code. am: bb48d640b3 am: 218012a3aa am: d52c2703e3 am: 44d6bbf72f

Original change: https://android-review.googlesource.com/c/platform/external/libcxx/+/1792712

Change-Id: I794f3f4e6f8061e5d3587381f169bbad82f7fe58