Add ART_DEXPREOPT_BOOT_JAR_DIR.

Replaces DEXPREOPT_BOOT_JAR_DIR which was removed here:
https://android-review.googlesource.com/q/topic:%22dexpreopt_bootjars%22+(status:open%20OR%20status:merged)

Test: art/tools/run-gtests.sh
Change-Id: Ic09ccc17fa689fcb23383e7abda4b9ac24ec2ff1
3 files changed