Revert^2 "zygote: use libcutils to allocate JIT memory"

This reverts commit af47ca01e96c280a15c24e2ae8152f61ffb8c1ce.

Adds legacy fallback path for ART buildbots which are running on older
system images.

Bug: 139855428
Test: boot taimen
Test: m test-art-host-gtest-jit_memory_region_test
Test: Flash taimen PQ3A.190801.002, setup chroot test environment, \
 art/tools/run-gtests.sh /apex/com.android.art/bin/art/arm64/jit_memory_region_test

Change-Id: Ieb89664c180c4dee08e98cb4c6b963f48c430832
1 file changed