Build: Switch on oat file mini-debug-info for boot.oat

Enable mini-debug-info for the boot image by default. This
can be disabled with WITH_DEXPREOPT_DEBUG_INFO=false.

Bug: 28474219

(cherry picked from commit 58f6bfaa37946835b3a4da279e4e4743181da159)

Change-Id: Ifd59d854f01ad8cf703f16d7a6e88c2c82d47feb
1 file changed