Re-add build files

The new script runs through the upstream configure and
make steps, copying the necessary sources list and generated headers
into {linux,darwin}-lib/

New in this version, we can use --enable-relocatable so that we don't
need to pass BISON_PKGDATADIR all the time, bison can now find it
relative to its executable.

Fixes: 31194194
Test: prebuilts/build-tools/
Test: take those results, and run builds with them (treehugger)
Test: prebuilts/build-tools/linux-x86/bin/bison --print-datadir
Change-Id: I66d7b5eb8c601c44ee0323df54df3b487494903d
48 files changed