Revert "Qemu-pipe: refactor qemu_pipe.h into libqemu_pipe"

It broke master
BUG: 36695011

This reverts commit ff87855e10423a1ad6f764f378b8182f86c6f738.

Change-Id: Ic1057a416748d4a3c9736cf3bb73982b8d45e5d5
5 files changed