Third-Party Import of: https://github.com/ublk-org/ublksrv

Request Document: go/android3p
For CL Reviewers: go/android3p#reviewing-a-cl
For Build Team: go/ab-third-party-imports
Bug: http://b/376130584
Original import of the code can be found at:
https://googleplex-android.googlesource.com/platform/external/ublksrv/+/refs/heads/third-party-review.
Security Questionnaire: http://b/376130584#comment1

Changes:
- Add compat/config.h to build on android without autoconf

Test: mm libublksrv
Change-Id: I284e2db55beeee203c4eee4c44b3cdfbc5e66628
4 files changed