android/filesystems/ramdisk_extractor.h: new file.

This patch introduces a new function that can be used to
extract single data file content from an Android ramdisk.img
image.

This will be used to extract fstab.goldfish in a future patch
to reliably determine the format of each partition image before
the emulator is run.

Change-Id: I4e8178ce1cedf0e93b852c632003d089bcd41701
7 files changed