jemalloc: provide a fully compatible Android.mk

In N, we still cannot fully rely on the .bp file.
So, we are recreating an Android.mk file which
is functionally identical with the bp file.

Also add Android.test.mk to make tests functional.

Current state: Jemalloc 4.4.0

Change-Id: I198d8b0a6e0bae47c3a48a9443002a77f7e226e1
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
2 files changed