[automerger skipped] Add ramdisk_available to init_first_stage's deps am: 019e3d06ad am: 47fec838b9 -s ours

am skip reason: Merged-In I044a075b7f8faf75e3ff8ef25ae01afc2aac5a32 with SHA-1 03001bd1cf is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libevent/+/15067035

Change-Id: I6981dd6fe7f7a5d614a2b9b1aea8a3e1a7876d0d