Add bison.runfiles_dir. am: 8e530191a5

Original change: https://android-review.googlesource.com/c/platform/prebuilts/build-tools/+/2985334

Change-Id: I0d12d5713b4c93916a70657869da8b08c5907b2f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>