Merge "Make vendor_ramdisk_available." am: de6b70ecc6 am: 36a222a636 am: d2bfa24bdf

Original change: https://android-review.googlesource.com/c/platform/external/libcxxabi/+/1470503

Change-Id: I50e64c4bbdc64d81dda1ee5f83626abfe7a7b41b