Make {A, L}San allocator more compact.
This change tries to reduce memory consumption of {A, L}Saned image by hacking
primary allocator internals:
* Reduce region size 2^20 -> 2^17.
* Make largest chunk size in primary allocator 2^17 -> 2^16.
The change appears to be quite useful for LSan'ed image:
Stock version:
total used free shared buffers cached
Mem: 964 828 136 3 4 92
Patched version:
total used free shared buffers cached
Mem: 964 688 275 5 13 185
Change-Id: I80b95f7dfb5a7be0e7208567a31606a3d027256c
Signed-off-by: Maxim Ostapenko <m.ostapenko@samsung.com>