JIT mini-debug-info: Add support for zygote shared memory

Ensure that zygote's mini-debug-info is visible to apps.

Remove global seqlock synchronization.
It was replaced by entry-level synchronization.

Test: test.py -b -r --host --jit --64
Test: device boots
Bug: 119800099
Change-Id: I4885f9a4d44743d5608793a2e5d6453123d111f3
3 files changed