Add bison to build-tools

This lives in prebuilts/misc/(darwin|linux)-x86 today, but hasn't been
updated in a long time. It also depends on external/bison to exist.
Instead, add it to our list of build-tools, and distribute a matching
copy of external/bison/data alongside the binaries.

Test: OUT_DIR=out DIST_DIR=dist prebuilts/build-tools/build-prebuilts.sh
Test: bison is in dist/build-prebuilts.zip
Test: bison data is in dist/build-common-prebuilts.zip
Change-Id: I76a9ce51e2a0ad5bc1da11493287d694398e1e96