Revert "Revert "runtime: Mmap uncompressed dex files (in zip) as clean memory""

This reverts commit 960b2af8a05f0844e78004e2d0d3ae6ab058d430.

Fix failing 071-dex-file-map-clean on target
which was due to an IO race in the run-test script.

Test: make test-art-target
Bug: 27650033
Original-Change-Id: I18efbd392c5980ffe0d983833b6cc581e0237b92
Change-Id: I6f4ff1e85f8326916c2ae0842a32f53fb7901639
12 files changed