[libvirt] [PATCH 0 of 5] Split up version script

This series starts splitting up the linker script into various portions, as described within.

Follow-Ups:
- [libvirt] [PATCH 1 of 5] Split out version script into multiple files
  - From: john . levon
- [libvirt] [PATCH 3 of 5] Move bridge symbols into a separate syms file
  - From: john . levon
- [libvirt] [PATCH 2 of 5] Move --with-driver-modules symbols into separate syms file
  - From: john . levon
- [libvirt] [PATCH 4 of 5] imported patch version-script-linux
  - From: john . levon
- [libvirt] [PATCH 5 of 5] Remove storage backend symbols from version script
  - From: john . levon